While I can't say whether these particular players were cheating, I can guarantee you that Bungie actively investigates network manipulation and other forms of cheating. We will continue to monitor game performance for people abusing the system and enforce our policies. As mentioned in two recent Weekly Updates, we've already dealt with a number of players who were confirmed to be cheating in one form or another. Rest assured that we will continue to do so. When you believe someone is cheating the best thing you can do is use the in-game Report Player function: https://www.bungie.net/en/Help/Article/12960