Add ability to hide game from GA page

For those of us that frequent the forums, we often find ourselves on trains and in other invite-only giveaways where we come across games that we haven't seen before in the public/group/whitelist GA lists. We can use SG++ to show if those games are on our SG hidden/filtered games list, but we have no ability to add these games to the list if it isn't on it already - we have to wait until they eventually show up in one of the GA lists. It would be very helpful to have the ability to add a game to the hidden/filtered list directly from the GA page.

I looked at the code used to do this on the GA list page, and at the POST made by clicking the button there, and it doesn't look like something that can be replicated with a user script, as the game_id that is passed in isn't on the GA page anywhere.