Had no idea this was an issue. Sounds pretty terrible and I don't blame you at all for getting so upset. The only times where I could see someone assuming it is a bot is if someone was teleporting around nodes which I have seen a lot of times in this game. But since you aren't doing anything sketchy like that and just farming, the least someone could do is send a tell first. That is what would be my first action if someone were to be killing something I need or gathering for that matter.