I don't know if this is true neither do I believe having bots doing trades. Boots are set to have a default actions and it needs to have thorough eveluation before activating to avoid losses on the trades it would do. I would rather trade on my own free will than having something to trade on my behalf.
I don't believe in trading bots before, but when I experience it on many exchanges, yeah its real. I don't know who set that. maybe the exchange or some people, I don't know how it works. I don't know what is their motives maybe to make the price stable? but one thing I am sure trading bots is very annoying. I agree with you trading in your own free will is much better.