If you were to log in, you'd be able to get more information on your fellow community member.
I personally don't find the 'Heather has two mommies' book offensive either. However, that doesn't mean that I find a parody of the book offensive. I didn't think that the parody, in this case, was the main point. In other words, was the author making fun of the book, or was she making fun of the PC attitude using it as a backdrop. I get the impression that it was the latter.
Regardless, I found the whole thing funny, and people who found it offensive are most likely being way too anal...er...sphincter-relaxation-challanged. :)
It's also nice to see that we MIT people can be entertaining!