There's nothing we can do about them, but while they are mildly annoying, I don't think they are doing any real damage, because the xbots have no real voting strength.

The bot creator claims that he did it to "normalize" downvoting by setting up bots that anyone can delegate to lessen the votes of large stakeholders. Honestly, his whole explanation made no sense to me (if he wanted to encourage downvoting, why specifically target the largest investors in HIve?) and I told him it was a bad idea, but I'm not surprised that he went ahead with it anyways.