Responding to people's rants with "Cool" or "cool beans" really does seem to encourage them to delete it, I'm not really sure why. Maybe because it's a bit of a dismissal. I had a friend who was getting self-righteous on Facebook - I had posted about something I think about a lot; kids who are raised by parents who grew up in a digital world and the parents' history on digital media and the potential of kids to get into it and maybe raise some very awkward questions - and my friend basically said "Well I'm not like that and I will never have that problem because I will just be an awesome parent" - and I just said "Cool" because, like, she was missing the point of my post. I was glad she thought she was going to be a perfect parent, but even if she was the gold-plated sparkling exception who was just better than everyone else at life, it didn't negate my thoughts or wonder on the topic. And yeah, she deleted it.

Her post was also at 2 am and I think she may have realized that it came across as really "I'm better than everyone else on Facebook so I just won't have this problem!" (she was like 'I don't post personal stuff on my statuses' - completely disregarding the pictures she uploads all the time). Some fights aren't worth fighting. I'm working on learning that.