Soldato
All this shouting of "high horse" is hugely ironic. Get off our high horses for finding the picture funny? Get off your high horses for preaching to us what our sense of humour should concern.
Ok then.
How about
"You have a completely lame, simple sense of humour"
There is nothing at all funny about a few people stood in the street. So they're chavs wow, hilarious.
The whole chav thing is done to death now anyway.