To be honest, I agree with @
Zipzo. If camping is proving to be an effective tactic against another player, I doubt anybody is going to stop it. It's not really hard to punish, either. If somebody is going to roll away, just run up and grab them when they stop. If somebody is rolling around you, just go in for a D-Smash. I mean, if you really want to, you can predict where they'll land when they finish rolling (which is pretty easy if they keep rolling around as a momvement option) and punish them with a strong attack.
I mean, I main Kirby. Kirby is probably one of the shortest ranged characters, is one of the slowest characters, and has a pretty bad air speed. Despite all of that, it's extremely easy to punish rolling. If you play any fast characters, you should be able to grab them easily. If you play slow grounded characters that are fast in the air, such as Jigglypuff, punishing with aerials (or rest, if you're feeling it) will work. If you're playing a slow character in general, such as Robin, spacing with his different variations of Thunder and using Arc Thunder would be efficient.
I'm not so sure about camping characters, mainly because, as a Kirby main, I can just copy their ability and out-camp them until they try to rush me and end up failing.
However, I do still think that rolling is a bit too safe. I mean, yes, it's easy to punish, but it's still over the top.