Instant "Enter" and "Comment" button?

Is it possible to implement something like this? Like the "Ignore" button, only it would say "Enter". And because I know people will complain that this way the giveaway creators won't receive any thanks, there could also be a "Comment" button, which would result in a pop-up form for entering a comment message.

You might be thinking "but what about all those fake giveaways!!11". Well I don't care, if you're so paranoid over winning something you haven't paid a dime for, just open the giveaway's page, check the giveaway creator's Steam profile page and his inventory, I don't know, do whatever you see fit.

But you know, just for the sake of convenience? What do you think?