Now this is one ridiculous discussion:
1. Why would you want to get frequent flyer miles if you don't want to fly?
2. Ok, you would do 1, because the ratio is so great, that if you do 10x a cheapo flight, you get enough miles into your account to fly First Class in SQ for half the price. Wow, take a risk of losing all the FF-miles in your account, losing the whole account, getting banned from flying with the airline for a while time/life, criminal charges from the airline, from the airport and, if you get really lucky: From federal authorities, because they assume that something else was planned.
^ Good one guys.