Slim people wear shapewear! It's not cheating because it doesn't make you look skinny if you're not (believe me, I've tried and all I got was just looking fatter for some odd reason). It's just nice to have a smooth body and for clothes to hang nicely on our bodies. It's appealing.

Cheating ?? Um please. Why don't we all just wear animal skins and never brush our hair or bathe. Forget about the notion of whats cheating and what isn't, its what makes you feel and look good.
If wearing shapewear makes you look better and then feel good as a result - GO FOR IT!

I don't wear shapewear unless of course wearing a bra counts. Mostly because I don't like the idea of wearing restrictive clothing and enjoy full movement. I couldn't imagine going for long walks wearing something like that and I walk a lot so it would be a problem.