The way GitHub reacted (blocking @homakov) is just wrong and destroyed all my confidence in them. Even more so when it was pointed out that @zedshaw crashed GitHub and didn't get blocked. http://sheddingbikes.com/posts/1306816425.html
Edit: Given that they have now stated that suspending @homakov was only temporary I no longer bear any ill will towards them.
I'm still disturbed by their security practices though. I expected better by the github guys and I don't like what this implies about the rest of their App. (And yes I am using attr_accessible and not attr_protected since its inception)
Edit 2: See here http://news.ycombinator.com/item?id=3664839 My worst fear that GitHub is using unsafe mass assignment everywhere was NOT confirmed.