It is best to treat them with respect, because you really don't want to be the subject of another patch on a jacket.
I've met a couple of them. Nice, laid-back people as long as you don't cross 'em.
P.S. Never borrow money or anything else from them.
LOL
I’ve known a few. My bidness is my bidness. Their bidness is theirs. No beefs, no problems.