The math says if your opponents plays 3 channeler and 3 swallow nest he have 30% chance to open with both. Duel links says if your opponent plays 1 channeler and 1 swallow nest in a 30 card deck he has 100% chance to open with both.
I don't know you guys but my opponents 100% start with swallow nest, and they always go second, with the field spell played by the skill this is not really fair in my opinion. And they can still play treacherous.. .
I just report all of them for cheating if they pulled bs top deck and a cheat skill. Somehow Konami never bans them because the report button is just a feature.
That being said cheat tools to fix your deck and to see opponent's hand, deck and set cards do exist, and let's not talk about the infamous "mysterious disconnect" one.
If you really feel like your opponent is cheating just leave the duel and move on, konami already made clear they don't give a 🔥 about cheating.