The new 703km long - 8m tall wall separating the West bank from Israel, will eventually have the luck of the old one in Berlin. In the mean time, it can also start looking more colourful, like the Berlin one eventually did, with graffitti!

With Euros 30, you can have something written on it (not as exciting as Banksy's of course)
and at the same time - organisers promise - support peaceful, small social, cultural and educational projects in Palestine.

How about the classic "walls have ears, and ears have walls"

Related:
http://www.sendamessage.nl