Pretty funny, but it's the same thing Superdickery.com has been doing, and doing better, for years.
Also, anyone who wants to know what's in the issue is missing the point, as putting any sort of context on these makes it no longer funny. Sure, we all know that "*****" used to mean "mistake" but god damn it, it's just funnier pretending that Batman and the Joker had an entire rivalry about who could make the most guys hard/who had the bigger penis. Same goes for these. Sure, there's probably an explanation beyond "Robin gets killed quite a bit," to that "Many Deaths of Robin!" cover, but it's just funnier if you think of it as Bruce being incredibly negligent, and a Jason Todd refference. Explaining the issue would kill the comedy.