Could the system auto-withdraw you from entries for newly-owned games when you sync your account?

This is something that happens to me a lot on Steamgifts:

"Oh, wow, a giveaway for a game I want! Imma enter it. And another! And another, and anoth-- wait a minute." (Searches and finds where the game is bundled / ultra cheap, buys it.)

At that point I have to manually withdraw from a bunch of giveaways. And often I don't notice or forget that I entered a giveaway for a game I just acquired in a bundle, since bundled games tend to get given away a lot. So would it be possible to make it so the system automatically withdraws you from any giveaways for newly-owned games when you hit 'synchronize?'

Or, alternatively, make the system do a final check to see if you currently own the game when you win (in SG's database, not the Steam one; I know checking Steam would be harder), and auto-reroll if you do? This would result in you losing your points, but points aren't a big deal, and someone accidentally winning a game they already own because they purchased a bundle with it or somesuch and forgot or overlooked a giveaway for it that they'd recently entered is an inconvenience for everyone involved.