Yes, I can understand the desire to pull a prank on this utterly ridiculous day, but I think GAG took things a bit too far, especially with the "everyone's a fake admin" thing. There had to be better things to do. They could have regaled us with all the fine updates they were planning for the site. Now THAT would have been laugh worthy.
You need to stay off the internet if it offends you this much. It's just a joke. I've found the whole thing funny. I can't believe the amount of people who are getting offended. If something like this offends you so much, you should stay off the computer. There are worse things in life than a gender swap. I'd hate to see you have to deal with real life issues if something so small like this offends you. You've obviously had a very sheltered life.
I think it had good intentions but I had fears that it might get out of hand - A good prank is only a good prank when everyone is laughing at the end but I can see peoples' feelings get hurt by this one. I answered a previous question when I said I found it funny at first, a bit disconcerting but I can feel a bit of disquiet building in my gut, not totally sure just a bad feeling.