Teaming happens a lot. I was in a solo today and people were openly discussing teaming up over the in game chat!
I have this coming for free with the Xbox one X i've ordered, so if it runs well enough I'll more than likely switch to the Xbox version.
At least there's far less chance of wall hacks, aimbots, rapid fire binds for single fire guns etc. Granted stuff like teaming is harder to stop, but hacks will be far, far less common. Plus the fact everyone is running it on same hardware with no settings tweak able too so it levels the playing field even further