To say words officially:
Feature suggestsions should go to the relevant section of the Twitch Uservoice not the third party developers support forum(s) - https://twitch.uservoice.com/
Unofficially:
I’m not sure which cateogry this would fit under due to the privacy nightmare. The other thing to consider is that if someone has many bans they probably need a report so Twitch can remove them completely and if they have say 200 bans, then someone either forgot to report them or the bans have been gatherered over years.
But there are many scenrarios involved here