I know someone who has two accounts on YahooChess and he plays them agts each other to boost the pts of one of the accounts, and then cheats to get the other account back up on points.
Pretty ridiculous and what a waste of time. I reckon there's heaps of internet cheats, as i play on Facebook chess and Gameknot and I always lose!
But serously nothing you can do but just play and improve then hit the chess clubs/tourneys to get a proper gauge on your level.