Yeah, depends on the situation. I don't boo or cheer myself (although I haven't been to a wrestling show in forever), but I find that okay. And of course it does add to the matches, a three star match can be turned into a four star one with a really hot crowd. Usually I hate it when crowds fuck around (beach ball, stupid chants, so on). Unless it's something that they made clear to the promotion that they don't want it (i.e. Lesnar/Reigns).
Shit like CM Punk chants during an entirely unrelated segment is stupid as fuck though. I hate the argument "Well I paid for a ticket so I get to do whatever I want." Wrestling at it's core is a performance, and you can ruin the entertainment for others with your bullshit. You wouldn't act like that during a play or other type of performance. Wrestling obviously has a higher tolerance for such things, but there's a line.