SG and Game removing ability that Steam has added

I just removed Bad Rats cause it is the only game I want to keep winning over and over.

Supposedly the games aren't 100% removed and the licence remains attached to your account - so really this sounds like the "hide this game from my account" feature - enhanced edition.
Still, I don't think SG will be able to tell if you have a licence for a game or not.

We can make rules fool-proof, but only if the fool is not inventive. There is a lot of ways to shoot yourself in the foot, we can't foresee it all.

I don't see how it would affect anything. If one enters a GA and win, simply don't remove the game, or face the usual consequences

What if they first play the game and then remove it? Anyway, in practise it has the same effect as just not playing the win. Anyone can just idle a game.

sleepycat already mentioned what will happen http://www.steamgifts.com/go/comment/2RtwQxa

if people want to remove games they won here, they can contact the GA creator, give him a key/gift for that game, and ask for a reroll or giveaway deletion.
it will be very annoying and i doubt some ga creators are willing to do it.

I think that for sake of being able to tell whether you activated won game or not - it should be stated in rules that you cannot remove won game from your account. If you do you will be punished the same way as you'd never activate it - because we have no way to tell if you did or not. If you remove by "accident"? Same as if you activate game on wrong account by "accident", drop the key somewhere by "accident" etc - you either face consequences (suspension) or buy another copy yourself and activate it.