you can report the bot but you need to put their name in order whoever on the other side can ban them (and sometime they will get ban for real so it kinda feel good) but typing all the bot name one by one is annoying as hell because their name is just random keyboard mashing.

luckily you only see them on early levels/starting area, outside that you almost never see them again (the furthest i see is around level 30ish area)

just get used to it, while they can get ban, they just pop up again its endless, and outside of gathering and killing random mobs, they done nothing harm to your play at least so just ignore them