Just answered a very interesting question in the forums around Colleague Tracker Data. The jist of the question was how do you clear colleague tracker data? After some exploring, I found the data is stored in the UserProfileEventLog table and queried via the [profile_GetUserColleagueEvents] stored proc. There is a profile_ResetAll stored procedure, but if you look at it, it doesn't reset the Event Log data! Bummer for this guy's issue!
Here's the MSDN post