cheating at all in any multiplayer environment..
If you do that; you deserve to be banned forever from playing games with anyone else ever again.
Of course those are just small examples; many variations of cooperative cheating in a competitive manner exist. Just as long as everyone has the same playing field.
Oh my god, I remember playing against a bunch of Scripters in League just a few months back. For the unaware, Scripters are those players who are essentially using H4x software to make their champion/hero do complicated actions or even worse with just a single click or something. I swear to me mum, I played against a DIAMOND 5 mid lane Ziggs who was obviously using scripts. It got me so pissed that after our team won, i couldn't help but talk smack to the enemy mid laner.
"Diamond 5 and losing despite scripts? You deserve to lose. Stay free GGEZ, and please uninstall"
I was not in the mood after that game.
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Then we have
ELO Boosting. Basically, you let a much better player play your account in order to help it rank up. This is the cancer that plagues Multiplayer F2P since the past year and even before. And the sad part is that ELO Boosting is actually a lucrative business to these shady players and users.
Great thing that in something like Overwatch where its basically Pay 2 play, ELO boosting shenanigas are essentially non-existent, unless someone actually is that willing to share their B.net account to a certain player.. i mean dear god. If you cant' climb then you don't have to! Sure getting to Plat, Diamond, or Master, or even Challenjour is going to win you b**ches and fangirls but for the love of all things, please do so in your own accord. Besides, ELO boosted accounts have been getting banned in League which is great. RIP Boosters.
The funny part was that at the height of my League power, in 2013 (Season 3), i had a couple of people asking me to boost for them, and they were willing to pay me cold hard cash. I simply told them that they can be better players if they just play the damn game. They are stuck in bronze or silver and complaining about being unable to climb? GIT GUUD son.