Start working on their car at 10pm with power tools when they have been in all day!
Listen to evening football matches on car stereo at full blast on their drive - why? .
Scream and swear at children first thing in the morning til last thing at night.
Allow their children to climb over our wall and invite themselves in (Back door left open for the dog) and feign surprise when I politely return their children!
Let their children thrown toys, balls, rubbish over our wall and then allow them to knock on the door to ask for the return of toys and balls (not rubbish though!) up to 10 times a night.
Have weekly playstation night with friends and scream and shout until 4am in the morning.
Put a concrete block wall (classy) 2ft over our boundary without telling/asking us.
Thats just the neighbours on one side, if I went on about the one on the other side I would need my own thread.
Phew......that was therapeutic!