To be honest, signs with misplaced or missing apostrophes are 10 a penny where I live in south London, so photos of these don't float my boat, but I do like snaps like this:

A bottle of cleaning liquid that's "useful for" poisoning cows and pigs. Brilliant.
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I'm also really enjoying the GraphJam website, "song chart memes and pop culture explained in graph form". It must appeal to my stat-crazy brain. Here, for any Proclaimers fans, is the sort of thing it offers:
More graph humour and song chart memes