The twitter feed bans is flawed. Players who are banned and then unband get picked up by your system even though they no longer have a ban. Surely your plugin should check that this ban is still in play? Yes I can white list them but one of my players pointed out that some server owners dont seem bothered in correcting this. So your plugin is just perpetuating a mistake

The twitter option is disabled by default (for this very reason, since 0.6.51). If servers decide to not allow a player that has received a ban in the past, by mistake or not, active or not, is up to them. The same applies to VAC's, game bans etc that have been lifted yet still visible via steam. 

I am aware that some, although rare, users bans from the twitter feed can get revoked. Cross checking this is expensive in resources, but will figure something out going forward.

Some server owners do not want to take any chances, others are more lenient.

The only reason it's actually shown, is to provide server owners as much information as possible, on any given player, and then make informed decisions.