You guys are incredibly responsive. I might try to sign a transaction with the key that allowed me to donate 5 BTC to Bitcointalk. But that goes way back. It doesn't seem simple to me!
If you can sign a Bitcoin message from the Bitcoin address you donated 5
BTC to the forum, it is good proof for your account recovery. Forum admins can ask you more questions to verify you are real owner of the Donator account or just a new owner (hacker or who bought that account).
During that time, I talked a lot about Ripple, and XRP wasn't well-received on Bitcointalk. I irritated some people and ended up "trolling," which resulted in a ban. This must have been around 2013 or 2014.
Be banned for trolling is very barely applied if it does not have something like personal doxing etc.
I only knew GameProtect was banned by trolling + doxing. He trolled many years but was not banned until days he switched to doxing.
Read rules.