This is ruining the game play for blue- brown belts, Its tiring that all these black belts are in Semi pro servers just to "Harvest" on lower levels, Please, Remove this feature, Its really annoying at times.

Eh,
I don't think anything can be done,
They can make Alternative accounts and join,
And I don't know if there can be something done

Lol.

Some black belts are just as good (or bad) as their lower belt counter parts. And as Zen said, it's possible to just make an Alt and join those lobbies.

Doubt anything would be done because there's such a wide variety of skill levels in black belts alone so you can't really do it because of a minority that's better than some lower belts and might be taking advantage of that fact.

But if they're truly farming then screen-shot or video them doing so. Otherwise nothing will happen to them.

Black belts aren't supposed to be able to join semi pro servers. If it is happening, ask a GM to fix it.