Chavs. Lots of chavs. I went through the rougher area of Cambridge (yes, Cambridge does have a rough area, I AM being serious. Don't laugh. OK, I admit it's not the roughest area ever, but it is the roughest area in Cambridge).
a dumbass cut across three lanes of traffic without signaling one way and then back across the three lanes (again no signal) to turn right, all in about a block
a customer not listening to a store employee and thus not finding the product they wanted and then the customer getting pissed off they couldn't find what they were looking for...champion