Notice Trolling
Not exactly vandalism, but still leaving messages with a mischievous intention.

When I lived in Halls at university, we had lots of shared facilities (kitchens, toilets, showers, etc.), and lots of passive aggressive notes ended up being sellotaped all over the place castigating people for various ills - not doing washing up, not cleaning toilets, using showers in the middle of the night, etc.

I discovered that lots of fun could be had by leaving replies. Initially, these took the form of simple rebuttals or counter allegations

e.g. 'I am disappointed to see you complain about my conduct when you yourself cooked a dinner party for 35 people on Tuesday using my cheese. That cheese was given to me by my mother, who in fact died last weekend, and was a treasured souvenir. how can you sleep at night you hypocritical bastard?'

These were normally signed-off spuriously from another student and, if successful, led to a reply. It was a bit like throwing a bone to a pack of wolves and watching the ensuing mayhem,. Albeit mayhem conducted in overly polite notices typed in comic-sans.

The best ones though, were my official-looking notes with the college crest appended at the top and purporting to be from the cleaners/the Dean/the Master.

My personal favourite being in one of the kitchens where arguments about washing up had been conducted through the medium of post-it notes for quite some time.

'Dear all. Please think of the difficult times you are giving us. I am 60 and have arthritis. I am doing this cleaning job alongside three other jobs. I do not expect it to be easy, as you leave a mess, but it is so unfair that everyday I have to try to clean around so many notices and post-it notes. Please - think of me and do not clutter the kitchens. Thankyou.

- The Cleaner'

Result - no more notices for a whole term.
(SnowyTheWereRabbit the Leporid from Hell, Thu 7 Oct 2010, 14:46, Reply)