i don't do this often but WGMG.
people who repeatedly have little to NO respect for other peoples belongings. and also people who don't think how their actions are going to affect people around them,
or don't think about the bigger picture... ie. what people have done for you in the past and then totally shitting on them.
this mainly seems to occure in the younger lot that still live at home and have NO idea what its like to live out in the real world.
try explain this to them and you get blank looks and/or a pissy un-understanding attitude.
as a mate says.. 'you can lead a horse to water but you can't make it drink'