OK I jumped in after reading the first page of this thread. It's the tired old "don't know about lube" slam that people like to throw around. It is certainly true that many people know nothing of lube. And a total newbie is certainly not going to know "anything" about lube. And the first thing they need to know is you can do just as much damage by adding the wrong lube as you can by not lubing parts that need to be lubed. Any time you add lube to a weapon you create a whole new set of problems.
First rule - WD-40 is NOT good for guns. It's pretty good for cleaning guns. It will get them clean but it will leave so much oil in the system that you will need to hose out your gun (with more WD) every 5 rounds or so.
"Clean" is the best way most guns operate that I've used. Turning a newbie loose with a can of lube is going to result in worse problems than running a dry gun IMO. If they don't know what lube or oil does what they will almost certainly mess up (literally).
All newbies need to learn somehow. I don't know how they will learn except a little trial and error if they don't have a patient instructor. It takes learning from your mistakes too. Too much lube is the most common mistake I see. I have several pistols that have never had a drop of lube at all.
I think people often lead newbies down a long path to dirty firearms that won't work well but teaching them to add lube when the gun really never needed a bit of lube. I see more guns that are gunked up to the point they won't cycle than I see guns with metal parts that have worn down so much they won't work. Guns that fire dirty ammo (like 7.62 x 39 stuff from the Soviet bloc) are usually the worst. Cheap guns bought by people who didn't care if they took care of them (because they were cheap) and then filled with dirty ammo (and cheap ammo which means lots of ammo) and a fairly powerful round which means a good bit of powder per round - those are the guns that I see that are the most gunked up of all guns.
Some were taken care of. It is really easy to keep a gun like that running because they were built to keep running no matter what they conscripted farmers did to them. Throw it down in the mud - who cares - it will still run. But I still see those guns so gunked up the bolt won't cycle and even worse the firing pin won't slide back and forth like it needs to do to prevent slam fires. They get that way from WD-40 combined with dirty ammo really. People think that stuff is miracle juice and it does do some things well. But it gathers powder residue like a magnet and keeps it in the action until you have a kind of black concrete inside. It's sorta like tar I guess only harder.
So let's not just point newbs at lube and tell them to go for it. They need to learn "how" to use lube and cleaners.
So apparently I have a pet peeve about this and didn't know it considering how long this post is.