Do we know what this is yet? I got it again today, but this time while trying to accept friend requests.

This is also in the US server :)

For me it still is.

I've also had it when working on AT duties

You can also just move to another page if it bothers you so much. Some people do enjoy it (I am impartial). 

This could be so helpful! Although, like Kayte said, there would have to be a way to change it easily as the team does frequently change.

They would have an alert to check it out once they got on :)

This is something to help them. Many of our staff members on US are very busy, and getting a million tags isn't the point. This would be an automatic deletion,so staff would not have to deal with the problem and others continuing to comment on it.