I dunno, not tech savvy. I have a brother I fell out with a few years ago. He has twitter. Been looking it up, periodically, in the last few months, both from PC and IPad. Other day he said something spectacularly stupid and I couldn't resist replying (I know, I know), from my twitter account (on the PC) that was set up 6 years ago and has roughly 3 tweets. Am now blocked from seeing his tweets. On the PC. But not on Ipad. (At home, surely same IP? Am I wrong?) How does that work?