Posting from a static IP as I do, it would be impossible.
The Admins would be all over ‘another account’ in a heartbeat.
*However*, if I used a service provider with dynamic IPs, posted from any number of available coffee shops or other omnipresent Wi-Fi hotspots, I could theoretically have as many accounts as I had time to move around to various places.
I have no doubt that sometimes, I am arguing with “a mob of one”.
My provider changes my IP every month or so. I think they do that to foil those who try to host a website at home.
I have a widget that alerts me when my IP has changed.