Over the course of a forum post on Battle.net, Blizzard outlined its policy on cheating in Overwatch, and placed a notable emphasis on the fact that players should play fair; play nice or suffer the consequences...
"If a player is found to be cheating — or using hacks, bots, or third-party software that provides any sort of unfair advantage — that player will be permanently banned from the game. Full stop," the company said. "Not only does cheating undermine the spirit of fair play that all of our products are based on, but it works to diminish the fun and enjoyment of others. While we are unlikely to publicly acknowledge when accounts are closed as a result of cheating or using unauthorized programs, we have and will continue to monitorOverwatch for exploitative behavior, as well as take action as needed to preserve the integrity of game."
Blizzard was quick to note that they will actively seek to verify accusations of cheating through the most reliable means possible:
"It's important to note that while video evidence from killcams, Plays of the Game, Highlights, and other community captured footage can be very helpful, we will never use it alone to verify whether or not cheating is taking place," Blizzard said. "As a result, we encourage players to play nice, play fair and avoid publicly accusing individuals of cheating whenever possible and instead use the reporting methods detailed above."