I guess it's just because I have always known that everything I put on the web is potentially kept around forever, that I generally don't put anything on there

I guess it's just because I have always known that everything I put on the web is potentially kept around forever, that I generally don't put anything on there I would be embarrassed about someone else reading. These posts aren't exactly damning or anything, and this is certainly not enough to make me want to stop using FB. I actually enjoy seeing it open by default - like you mentioned, these are hilarious. I couldn't care less if everyone can see my wall though admittedly I'm not a heavy user. This is pure value-add in my opinion, a downside for only a very few.