Notice: You have been identified as a bot, so no internal UID will be assigned to you. If you are a real person messing with your useragent, you should change it back to something normal.
Depending on priority, so-called human shields are not put to an effective setting unless greater than 100 non-target humans. That is, a human shield for the top priority target is composed of 101 humans, while 100 humans are not granted shield status.
So you see, there's a perfectly reasonable explanation