1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
The mastermind trickster behind these posters, Sir Michael, is active on Twitter where he posts his new posters (and other stuff, probably!). 
21 Completely Ridiculous Bulletin Board Ads From The World’s Funniest IRL Troll
By
Jacob Geers,
