Sounds good, but you could also have it like it was on esporthalle. When a player gets hit by a blast, no matter from what, he got a menu asking
"Do you want to turn off blasting from other players
1. Yes
2. No"
If you also could add an admin command to override the user blast command.
amx_blast 1/0.
When 'amx_blast 1' all players can be blasted, with 'amx_blast 0' no player can blast any other player.
__________________
A dodo: Used to describe someone without common sense and who always has the pathetic confused look on their face when a question is asked.