Two of my favorite blogs are The “Blog” of “Unnecessary” Quotation Marks and Apostrophe Abuse. I get a surprising amount of satisfaction out of others’ punctuation errors. Call me a geek and a snob if you’d like.
I snapped a photo of this sign earlier today while I was at our animal hospital. It doesn’t include errors related to quotation marks or apostrophes, but it most certainly provides a bit of entertainment (aside from the fact that it is advertising the sale of puppies, and I don’t really agree with that notion).