All methods mentioned here are no recommendations.
Each visitor acts at his own responsibility and at his own risk. If you make a flight booking you should know what you are doing.
Cheating with fare conditions can have massive consequences. High additional financial demands from the airline or the cancellation of the ticket could be possible.
Everyone must be aware of this consequence.
And please don’t cry if they catch your loved frequent flyer card (Even if I never heard about it, but you never know :- )