I will never do that again. If that was to become the standard, facebook shot themselves in the foot with their crappy APIs anyhow (see http://news.ycombinator.com/item?id=1731427 )
And I have a facebook account, and I'm really hesitiant to like or authorize anything for fear of the author (or hacker) using it for malicious purposes or Facebook one day making my actions public etc. I think a lot of folks are too.
FB may have been seen by some folks over the last few months as the magic solution to universal social media authentication but I think its becoming apparent that it is not. And thats a good thing.