So it is a DAPP issue. That is a technical problem with the platform not the abuser. The platform actually is allowing the spamming. The problem of DAPPs therefore needs to be addressed. We shouldn't have to chase the tail of the snake. It needs to be cut off at the head. Technical issues require technical solutions.
There are two issues here. The first issue is miscreant members, the second is the DAPPs. Let's keep those separate for the purpose of clarity. I can't talk to a bot. No one can. Perhaps the bots should not be there in the first place because they give an unfair advantage. That makes it a security issue for the platform to address. 

I am not qualified to discuss the DAPPs. I see them as a problem. You should as well. They are taking unfair advantage of the reward pool.

Putting enforcement in the hands of the criminals is not a good plan either.

I don't have all the answers. I do however, see two problems here. The flag and the DAPPs.

With a 30 window of exposure on Steemit, you don't have the luxury of time for defense.