I have to agree with everyone else.  Nobody wants to play this with an arbitrary coin toss.  It's just a flashy and unnecessary rule you made up so people don't spoil YOUR good time.  Sounds pretty narcissistic if you ask me.  Why don't you let people who know what they're doing roleplay responsibly?  

Why exactly do you need to spoil everyone else's fun because you're afraid of OP characters ruining your setting?  Besides, you even admitted you stole your idea from Ravenloft, so your setting isn't even 100% original.  Just go play that instead of trying to create your own and let people roleplay how they want.

P.S.: You even copied MY character sheet from MY cyberpunk RP from years ago.  You forgot to erase the original race description too.