No...in fact this has never even been discussed before...
Cheating?
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You have caught me. I am an evil genius who has mastered the ability to manipulate the internet at will. I intend to rule the world by using this enormous power to thwart the online chess aspirations of a few unfortunate victims. Sadly, you sir are one of them.
I am the Don of a major crime family with operatives in every country in the world who can drive up to your house in windowless vans and jam your wireless at my order.
Has anyone come across suspicious wireless outages when games get very competitive?