I'm starting to agree.
Apart from anything else, it makes it harder to find threads on something specific because so many are posted under AIBU when they would really be better in the appropriate topic - 'am I being unreasonable to wean at 4 months'-type thing (not a real example but you see what I mean).
I also suspect it encourages people to be unreasonable. I liked the idea at first but it does seem to have had a negative effect overall.