My entire post was about targeting specific visitors. Zero evidence. > That's nothing. Imagine how tired you'd be when it turns out everything you thought is "

My entire post was about targeting specific visitors. Zero evidence. > That's nothing. Imagine how tired you'd be when it turns out everything you thought is "paranoia" is actually happening. Every genius and every crackpot experience this. The sad fact is that crackpots outnumber geniuses by a factor of hundreds. You missed my point about means, motive, and opportunity by a mile. None of the web services/app you mention block specific visitors; only accounts. Again, my entire comment was specific to the hypothetical capability and desire to block per visitor, not domain/account or IP.