So fun fact: even if you're permasuspended on Plebbit it doesn't stop you from editing your old posts. You're still limited to editing only going back... six months? A year? I forget what the limit is the set after the Voat exodus. I sure hope nobody takes this knowledge and uses it to edit their old posts and point people to forums not run by fascists or anything.
Personally I recommend combining URLs to fun forums with ASCII art like dickbutt.
I used a script a long time ago to mass edit my comments to nonsense and then delete my account.
I understand more selective editing on accounts used to post in hostile territory, just to poison the record before you go.
Reddit's still a lost cause, either way.