As I do not want to think about the morality of upvote bots, I stopped following the downvote trail. There were always people who considered using upvote bots as something immoral and bad. Now with the free downvote mana, many cleaning services appeared. Delegating SP and getting upvoted by a bot is presumably something that some people do not like to see. So be prepared to have your posts disliked. Possible solution is to stop delegating and just use your SP. The users should distribute the rewards, not some bots. The idea of Steem is that users motivate those who produce great articles, not motivate those who produce bad posts and downvote those who produce malicious stuff. Using bots hurt Steem in the long-term and that is, of course, something that others do not like to see.