I don't know if there's something disarming about posts which start with that sort of nervousness, or (more likely) that people who are that sort of cautious overestimate how provocative they're being.

Perhaps we should recruit some local firebrands to keep 2d6 with their computer and roll on every opinion they express in a comment, adding the disclaimer every time they get 12.

The fact that we know that they're doing this would probably invalidate the experiment, however.