Pardon My French

I expect little kids to wreak havoc with crayons and markers but why would grown adults feel compelled to write nasty words on tables, chairs, walls and elevators?  Someone has been going around scribbling obscenities on the furniture and inside the public elevator.  As soon as you scrub it off they write "B*tch" or "Wh*re" all over the place again.  Grow up people!