Well funny thing is, contrary to the other opinions on this forum, I actually really like Taco Cabana. It's one of my favorite places to eat, and definitely my favorite fast food place. It is a wholly-owned subsidiary of a conglomerate, but it still operates like a locally-owned company for the most part. The gun policy is not one that is actively enforced by the employees in the store. Efforts by Texans to persuade the company to take down the signs have little odds of success considering that the ownership of the company is not really on board with Texans' attitudes about guns.
Now of course everyone is correct when they say that by eating there, I am "supporting an anti-gun company" but also, I am supporting a "makes food I like to eat" company, and a "makes food at a very reasonable price" company, and a "employs local people" company, and a "I dig eating on the patio" company, and a "very convenient, right around the corner" company... There is more to life than just whether a store's corporate owners are anti-gun or not... I just consider this to be one of the many pros and cons of eating there.
Certainly it's an annoyance for them to have a 30.06 sign no matter how valid it is. But there really is no viable competition to Taco Cabana around here, IMHO. The company I work for has a 30.06 sign. It's bone headed but if you guys were to quit using the products they make, then you would not be using this forum that's for sure. If you didn't want to support them with your money, then you would have to empty your 401k and sell off all of your mutual funds, as I guarantee you that if you have either of these things you own some stock in my company, whether you know it or not. So where do you draw the line? At a fast food joint just because it's convenient, or are you going to go all the way and boycott things like the US Mail, the internet, the court system, public schools?