Since you asked a reasonable question, in a respectful manner, I will answer. (and probably regret doing so).
Playing anonymously (unrated) depends on the play. Sometimes you do....sometimes you dont.
With straight counting, I rarely played rated. No reason too. It identifies you and makes it easier for casinos to string together results and see what you are doing. Additionally, casinos just don't give you much for table play anymore.
But other plays, like the above-mentioned Jerry's nugget play or several other plays, especially promo type play, you HAVE to play rated. There is no play unless you are playing rated.
Additionally, all of our machine VP play was done playing rated. Had to be to get the mailers which made the play +EV.
I did need to be careful at casinos where I played blackjack unrated (card counting) and also played rated on machines. I always assumed that surveillance would follow me and piece it together, so I never went from one directly to the other. If I played rated and unrated at different activities on the same trip, it would be seperated by lunch or something.