Bingo. It would also make it trivial to alter images just enough so that it wouldn't match the hash, and then they can post shit that would need to be manually flagged and removed.
I already see things like this with pirated media; pirates will include extraneous material bundled with the target media so that it's not automatically flagged and removed.
I have a pair of Bellville MiniMils that I wear every single day; I had the last pair for about three years, and I'm at about a year and a half on this pair. I work and hike in them (although I want to get nicer hiking boots, something like the VivoBarefoot Tracker). They are minimalist boots though, so if you don't already like and wear minimalist shoes, you're not going to like these.