WHAT IS IT WITH PEOPLE IN THE GYM?

I attend a 24 hour gym called +Anytime Fitness  and usually go late at night.  A trend I'm seeing that seems to be getting worse is other members that don't put their equipment away when they're done.  They literally just leave shit laying all over the place.  I would hate to see what their pigsty of a house looks like.  And then you have the guy that literally has about half of the equipment in use.  He's got his water bottle on one machine, his weight lifting belt hanging on another and a towel draped over another.  Does he think this is his personal gym?  There's also the yeller.  You know who I'm talking about... the big guy that is curling with 80 pound dumb bells and lets out a blood curdling yell with every rep because he wants everyone to see how much weight he's pushing.