There isn't just one air steward, so that remark is clearly void. Thats the point, he could have done anything - he ONLY punched an air steward, generally because he wasn't going to comply with the request. Smoking may be prohibited, I'm sure sex in the loo's is too, but does it stop people? I think not.
It wasn't worse than it was, stop trying to make out like it's a huge deal because it definitely isn't.