"Seen" used improperly drives me nuts and also incorrect grammer that drives me nuts is "don't" used in the context, "that don't matter". The correct word(s) is, "that does not matter" or "that doesn't matter".

I see a lot of incorrect grammer here in Texas, more then I've ever seen before when I lived in Michigan. Not sure why, but every time I hear it, it bugs me hehe.