Bind Bluetooth to MyBlogLog? Sounds Scary

If you head over to the mobile version of Yahoo!’s MyBlogLog service (I use the regular web version of their service here — look at the left sidebar)…

…you will find they say this about their mobile service:  Bind your Bluetooth address to your MyBlogLog account and discover others nearby and find out if you have any shared interests. Keep track of time spent with others so you have a running log of people to meet and things to talk about.

Is it just me? Or, does this seem like a this has the potential for really bad things to happen?