I'd be interested in a pizza sub, or pizzas are always welcome over in s/cooking.

This is how I think that's likely to play out, if you start banning people like you thought you were on reddit, someone's probably going to complain to magnora7 and then he decides if your actions were appropriate.

Although practically speaking, if someone is posting on your sub at all, it's probably not a good idea to ban anyone who isn't a spam bot. We just don't have the numbers treat users like they're disposable, which imo is a good thing considering how many times reddit has done exactly that to me. That's my take on the situation anyways.