Watching a thread while being banned, I often find myself wanting to respond but being unable to do so.
What if there were a userscript that allowed a side conversation to exist along side an existing thread.
The data for the side conversation would be stored off-site, but its content would be overlayed on top of a thread.
Only users of the userscript would be able to see your comments, but that could be a good thing too.
It could be like a secret club.
It could be named SideChannel or BackChannel.
You could also s/Channel/Chan/.