"tasers are completely non-lethal"
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I strongly suggest you do a little more homework. You might find a couple of facts that offset your opinion. Like:
http://www.infowars.com/print/ps/police_back_tasers.htm
http://effectmeasure.blogspot.com/2005/02/another-taser-death.html
http://www.reviewjournal.com/lvrj_home/2004/Oct-23-Sat-2004/news/25075550.html
In fact, when I ran a search on Google for the words "Taser" and "death" I got a total of 607,000 hits.
If in fact you are dealing with real gangs or wannabees, then you have a real problem. Direct confrontation is not in your best interest, that's what gangs do best. Never fight an opponent in their area of strength, look for their weaknesses and use those against them. If you go to war with the gang on the gang's terms, you essentially set yourself up as just one more gang in the fight (even if you are only a 'gang of one,' to steal a phrase from my former employer). And more than that, you directly challenge the gang. They CANNOT ignore you at that point. They have to not only come back, but do more bad things. That means real damage.
And if you set yourself up as an equal participant in that fight, the odds are better than even that the authorities will treat you as if you were but a member of a marauding gang. After all, the authorities are all about social control. They might not be able to exert any control over a group of local youts acting in loose confederation, with no known addresses or assets, who by the way might be genuinely dangerous if confronted by said authorities. But you, my friend, have a known address, a job, an income, assets, a good name/reputation and community standing. The authorities can darn well exert social control on you. And unless I miss my guess, they would jump at the chance to do so.
Besides, you aren't viewed as nearly so dangerous as that loose confederation of local youts.
You are a lot softer target, and the repercussions of your arrest and trial will ripple far out in the community. You will be a good example of what happens when (gasp!) you take the law into your own hands. You see, government needs people who need government. And they INSIST that you need them, in many cases. You want to be an example? Fine, go ahead and pick a fight with these kids. Just think about how you will look on the front page of the local paper when the picture of your perp walk appears above the fold.
Please note I am not attempting to jerk your chain here. I'm an oldphart retiree, not a teenage keyboard commando. Disbelieve all this if you want, it's no skin off my posterior region. We don't have gangs out here in the country where I live, but we still have crime- and I built a fence around the house and another around the entire 5 acres we live on, and all the gates are locked all the time. The fence is there to keep the dogs in (and the neighbor's buffalo out), and the dogs are there to keep wouldbe trespassers out. So far it's worked fine.
You think you can't afford a fence? Try renting a lawyer for a few months. You better get smart, quick, or you are risking losing everything you ever had, to include your parents' lives- or your own. IF these kids are a real gang that is. Don't get so busy thinking about what you are going to do to them that you forget to think about what THEY can do to YOU. They have less to lose.
And I am not saying just roll over and take it, or move out and let them have the area as part of their new turf. I _am_ saying you'd better learn to fight smarter, so you don't have to fight harder. Start out by doing what it takes to get the authorities on your side, and not making yourself their target-instead of that loose confederation of local youts. The authorities need victims who need their help- you'd better learn to portray yourself to them as a victim, not as the neighborhood Patton/Rambo/John the Wayne. Ask about help in establishing a Neighborhood Watch, or cooperate/participate in any other community outreach programs your local law enforcement organization(s) happen to have going.
Truth is, the 'gang in blue' can act just like any other street gang sometimes (and some street gangs have actually infliltrated the local law enforcement organizations as well, remember). What you want to do first is gather the authorities up and aim them at that loose confederation of local yout which is causing your problems. You _don't_ want to bring the authorities down on your own head by doing something open, obvious, rash and unmistakeably attributable to you and only you against the gang that's moving into your neighborhood and attacking your parents' property. And you _don't_ want to go yelling to the media about how the local cops aren't doing their jobs, and aren't protecting your aged parents who are good citizens and taxpayers and are being victimized by an out-of-control criminal gang.
Here's some homework-
http://classics.mit.edu/Tzu/artwar.html .
Good luck,
lpl/nc