Those pesky text art billboards and the ones on tempelhof are apparently the work of Scottish artist Robert Montgomery

at first they annoyed me but then - noticing yet another on my way to Berlin Festival last night- I actually stopped to read it... And ended up having a satisfying art viewing experience that lasted more than 30 seconds.

Anyhow,
Read all about it in the exberliner: http://www.exberliner.com/articles/“i-don’t-want-to-be-ironic”