Yes, you do have a reason: the practice and preparation to be anonymous takes months/years. I don't care if you're Bruce Schneier and Richard Stallman rolled into one, you will slip up the first time you try. 100% guaranteed.

The standard for needing this kind of anonymity is anticipation of a use case. By the time the use case is at your door, it is too late and if you are unprepared your best bet is to bend over / run away (as the situation permits).