Famous Youtubers Botting?

sound interesting, to the 2012 untill now i'm always considering youtubers to pump up your channel or use bots or buy traffic like adword or maybe do both. now i understand on 2017 change maaany things and beforeo on 2012 are very easy to make views using bots, but now on 2017 i know the security are more good but i think there are always a trick to have a good traffic using bot. did you think guys now on 2017 some youtubers using bots?