Samay - I dont condone your neighbours behaviour one little bit but it reminded me of when I lived in an upstairs flat next door to a family home with a back garden complete with trampoline. It drove me to insanity - the repetitive thud thud thud - or boing boing boing or whatever you would call a trampoline noise - everytime there was slightly decent weather their kids would be out on it for hours on end. I am a very tolerant person of kids playing especially and noise in general but it was the repetitive rythmic - like a dripping tap really I suppose. Now my daughter who has a 6ft brick wall enclosed garden has new neighbours who have a trampoline and she know has kids and adults heads popping up looking into her kitchen at ten second intervals in any fine weather. Sorry no offence but I am not a fan but would never do what your neighbour did - I tried to sort it amicably.