Yes, well, when you were on an illegal server it is unlikely that you need to be able to provide evidence for any action you take so that during an appeals process other folks on the team could confirm that action.
“I saw them, they were botting”, as easy as that would be to do, just isn’t good enough because mistakes are made and the goal is to do what we can to deal with those who may be exploiting, without also negatively impacting legitimate players as best as we can. So those investigations often take a good deal more than visual verification.
So to answer the original question, not botted as not accepted, any more than any crime is simply accepted in the realm world. It takes time though, more than we’d like, but that is sometimes the cost of being as thorough as we can be.
If you encounter someone who you believe is botting, please use the right click report option to report them. If you have video evidence, please send that to hacks@blizzard.com. We do use videos in our investigations, though not as verification specifically but to as a confirmation steps to help in the investigation.