Yes, he is and he has acknowledged it a few times during interview. David wasn’t trying to hide, but he wasn’t trying to show himself. He was just living his life.
It is legal to circle an area for hours expecting to see your fav passing by, taking pictures and releasing them. But it’s not because it’s legal that it’s okay, right, healthy or normal, imo. I guess we should be glad this person didn’t try to sell those pictures to TMZ!