No you cant tar everyone with the same brush but having worked for a local authority designing these facilities for travellers - only to find that when the first lot decided to leave they took every bit of plumbing, sanitary appliances and anything else they could rip out away with them it makes you wonder why we bother.
Also a group of travellers turned up near where i live - parked their luxury caravans in the middle of a well used local football ground, strung their washing between the goalposts, put up Gazebo's and luxury garden furniture, drove about in their brand new Mercs and BMW's and Left a mess and stopped the field being used for 3 weeks.