I got a PM from someone once informing me that I was being put on ignore by them, and I could not acknowledge it, since I couldn't PM. It happens sometimes.

I wouldn't worry about it. If someone decides to put someone else on ignore, it's something they feel they need to do for themselves for whatever reason. I suppose you could look at it as a good thing, in that they are hopefully doing it as a positive coping method, but I know it can sting.

gg