As opposed to being done accidentally?
These presentations were, of course, intended to be jokes. In fact, I'm sure they were designed to be harmless, unoffensive jokes.
Who cares?
Children and adults who were rightfully offended were all in the audience. TechCrunch showcasing an app designed to turn objectifying women into a social network is absolutely absurd.
I'm not a woman, but I also don't think that these types of "jokes" are acceptable at any sort of conference. If you want to joke around with your friends, fine. Hell, if you want to make an app called TitStare on your own time and publish it, great--but for an all-ages industry conference to publicize it? That's wrong.
I believe that the tech industry as a whole is doing great work towards being less misogynistic and being more diverse. Stunts like this at well-known events are huge road blocks towards that goal.
I'm not saying that they shouldn't make joke apps, but TechCrunch should not have let them take the stage.
Well, there's your problem.
(of _course_ they were done intentionally.)