Apparently I have accidentally blocked some people. I had no intention of doing this! I'm not sure what I did. I was very panicked at one point and tried unsuccessfully to entirely delete my account. I wasn't able to. And then I changed my mind. But I just want to let all of you know, that if you are a person who has found yourself "blocked" from pm'ing me, that was completely unintentional on my part.
BB