Blacklisting members so they cannot enter the giveaway

[DevMarlin]

This could helpful.

[n-11-eleven]

Entrant modification will not be added to the bot. Blacklisting roles/members from entering giveaways goes against following consistency of this bot that its users can rely on: If you can see a giveaway, then you can enter it. Refer to issue #153 for more info on this subject.

[jagrosh]

To blacklist someone from a giveaway, hide the channel from them