Fully agree with Farang on the 'free' publicity thing. It's all over god knows how many webs now, plus news as Pete points out.
It really doesn't matter what any of us feel about Hitler himself. Nor does it matter what we think about the billboard in question. It's worked, and I'd LIKE to think it was intentional......
'Better to be controversial than boring' as Lennon said.

A sprout is for life - not just for Christmas.