what will be if to blacklist guy who entered your giveaway and he will win?

It would be way too easy to abuse.

you can not-deliver the game instead. you just lose 1 slot.

edit: you will probably get a suspension if you abuse this, since your reason won't be in the rules.

I thought his question was: If he blacklists the winner of his giveaway if he still would win.

blacklisting -> you cant enter
but you can enter and get later get blacklisted. but you are still in the ga and you can still win tha gas, you have enterd, before you got blacklisted

You're right, he formed his sentence in an odd way :D

If they start suspending for this the only option for such cases (e.g. winners who are repeat offenders) would be to switch to whietlist-only giveaways, where the giveaway creator can ensure entries are all from good users. Not sure this would improve the site.