"Well, X has issues" to explain truly obnoxious behavior on the part of someone, usually a patron, in their late teens or full adulthood.
I also have issues. Somehow, my issues don't cause me to go into a place, make loud and revolting noises, claim total innocence when called on the behavior (even though I am the only one in the room) and then accuse the person who asks me to be quiet of being racist.
That's one example. That phrase used to be handy for explaining some simple meltdowns....but these days it is applied to everything that our teen patrons (in particular) do.