I discovered today the following. I use IE11, Edge on my PC and on my IPAD, I use Safari. Again banned from forums. Delete cookie using IE 11 tools, reboot, still cannot access the forum with banned notice. Look again for a cookie using IE 11, confirm there is no cookie, yet I cannot access forum.
Go to my ipad, which also prohibits me from accessing the forum, find and delete FSDT cookie and voila now I can access this forum on my PC as well as Safari. Why would having the FSDT cookie on my ipad, not on my PC, ban me from using the forum on my PC? This makes no sense. Except that I use the IPAD connected to my home network, and my PC is connected to router directly via ethernet cable. I do not know enough to understand or prevent this from happening.
Greg