Many who are overweight don't feel comfortable with their own body and tend to hide it away.. And my advice is you shouldn't wear anything if it isn't making you comfortable. If an overweight person wears skinny jeans and don't feel comfortable in them, I'd say no. But there are those Who don't care or do feel good in their own body, and if they do feel comfortable in skinny jeans, wear them! And don't give a sh*t about what everyone else think.
I mean I guess I will only answer this like this, fat guys should not wear skinny jeans because its just all wrong. (gave me the shivers) lol Thet just don't look right. As for girls some can pull them off and some can't so its a toss. On thing fat people shouldn't wear is like those tights. I have seen way too many 300+ lbs women wear them and every fold is wayyy to visible. I'm talking nasty camel toes I don't wanna see but my sister says hey look over there and I look and ugh. lol