It depends on the type of botting. If it's a lvling bot like a fate farmer I don't care. Only time I care is regarding rmt, because that hurts everyone else, as it devalues their currency and their buying power if someone buys gil. I am 100% skeptic anyone who'd do this cares how it affects everyone else, so I already know talking with them will change nothing. If it were an rmt bot however I'd have no idea who it belongs to so......
If it's a gathering bot (not sure if those exist) it depends on whether it's on a massive scale. (setting it up to work very long hours and even nights a normal player can't do while sleeping)
I probably wouldn't report aside from rmt, and I wouldn't report my close friends.