i,ve lost on purpose, why? because i got lucky, very lucky, with some of my early games, and my rating become ridiculously high.i did it to get back to reality.
In my opinion, the best way to "get back to reality" is... keeping it real (i.e.: just play and not try to "trick" the rating system, which is designed to cope with lucky shots anyway).
I think the rating floor is the way to go. There was a player here who had many games going, then lost a bunch of them on time. He lost about 1000 ratings points too. He wasn't sandbagging, but it still wasn't right for people to be playing a 900 rated player who was actually around 1900. The rating should reflect your playing strength.
Sandbagging is just plain dishonest, and if it can be proved (i.e., the player resigns a bunch of games after 5-10 moves in non-losing positions) then the player should be punished. Or the system should be designed so that sandbagging doesn't pay.
That would be hard to prove. What happens if, for example, on move 10 I do something stupid and drop a knight or bishop. That is normally a decisive advantage for the other player so should I play it out, possibly for 50 or more moves, with a high likelihood of losing anyway or just give it up and shift my focus to another game where I have a better chance of winning? There is such a thing called morale that takes a hit when you lose and for some people it can distract them from other games where they may be doing well and cause them to blunder those games, too. It is better to resign the lost games and put them out of your mind as soon as possible and refocus on your remaining games.
I also agree with the poster who said that a rating floor may not represent the current skill of the player. Our chess skills change over time. Some people get better and some go into a decline. Rating floors assume that a players chess skills always increase with time, never decrease. Just because someone has a career high of 2400, doesn't mean they will always be a 2400 player. They may even decline further than the 200 points the USCF uses. In that instance, that player may as well quit playing in rated tournaments because he will always be paired against players who are better than he is and he won't get many wins. It also does not account for streaks. We have all had winning streaks where our ratings soar for brief periods, but then they level off over time. Is it fair that someone should be forced to play someone beyond their strength because a streak pushed their floor up?