of course no one here really knows 100%, but...
2 things id watch, first, lcp. if its even a thing anymore, or ever was. pathing detection. the longer you farm, the better chance pathing detection software can catch up to you. /tinfoil hat
second, player reports, if you run 4 hours on one toon, there is a better chance of you running into the same people over and over. some asshat sees you fly over them for the third time, they might think about reporting you, just to goof with you.
running the same profile on 2 toons for half the time each seems like a better idea than running for the whole time on one char.