I always read your posts which I find entertaining but your logic escapes me. Now let's look at bid bots, so they sell a person 200 SBD worth of votes, this is pure profit for the bid bot it can certainly reduce the price for its vote to levels that will please the user say turn that 200 into 80, at the same time its curation rewards will be double so this bid bot will be even more appealing to those who don't want to work and delegate their SP to bid bots, so the bid bots vote will be even more valuable making it more attractive for users.
As for downvotes, I don't think so, a retaliation round of downvotes by a bid bot would make a lot of the downvote lovers think again about downvoting them, this apart from the fact that a lot of big accounts are bid bot delegators. And just by watching how downvotes have stopped @haejin and @berniesanders who actually taunts people to downvote him, I'd say this idea is completely insane.