There is no competition in this world where cheating is "ignored". You get fifteen yard penalties, ejected from games, fined, barred for life, etc etc. "Oh, we discovered you are trying to fool so we are just going to ignore that." C'mon. If they caught everything 100% of the time, that would be one thing, but it is ludicrous to not penalize deliberate cheats when they are caught.
"Ignoring" might be read as "not counting the extra benefit that comes from cheating".
But if you look at sports, and e.g. a bicycle racer that "normally" would rank #5 in a big race is caught doping. "Ignoring" would mean awarding him 5th rank instead of kicking him where it hurts.
There have to be read lines and if you cross them there must be a penalty. (IMHO)