i don't think so. i haven't seen this anywhere else. the user agent is more likely shown to see which OS the commenters use to give an idea how widespread linux is among the commenters, or maybe to see if someone is a true linux user. and the location to see where everyone is. that may help find local contacts.
thank you. this seems very recent, which would explain why i haven't seen it yet. but it targets big sites, not something small like linux.cn. also, linux.cn has not been under active maintenance for a while, so i doubt that its maintainer would have rushed to implement it for that reason.
my friends tell me that the maintainer was a member of the beijing gnu/linux user group, which, at least in recent years, was more privacy conscious, and although that doesn't mean that the linux.cn maintainer was as well, if you pay attention to his concerns in the post, he does seem to share some of those values.
