There is a difference asking how many users are visiting from mobile devices than how many are visiting with what OS. Can just straight up ask the first.
How could that information be used to attack a visitor? You really think that only legit people visit this site? You dont think that someone would try to do something like post up a pic or hijack the site to try and infect others?
Gee that thread certainly looks like someone attempted something now doesnt it? So yes i do think that the information would be hazardous to post cause it would draw attention to the wrong type of people.
I have been bugging Larry for almost a year now about a mobile version. I have bugged him about looking into a Lo Fi version or just installing a mobile skin. This is not a new request, it is not something that has been forgotten. At the same time posting up a rally call is not going to get anything done either. We are working on it and we will get it done, it is just taking us time.