That could be quite significant. I notice a lot of blogs that aren't really adult in nature have nonetheless been marked by their owners as such, presumably because they sometimes deal with topics that are a little bit racy and the owners want to stay on the safe side. TOS means I can't give you a good example, but what I'm talking about is very mild indeed, blogs I came across when I was looking up another topic entirely. These people will be quite alienated by this message, and will probably end up moving to another platform.