Bots are an odd topic. Without them skills such as Prayer, Construction, Herblore (pretty much all skills that require you to buy and use items), would be insanely expansive. But on the other hand, it makes skills like Fishing, Woodcutting, Mining (skills that produce items for before mention skills) less profitable. In my opinion I prefer them, but when they mess with things like my Slayer task, I get mad.