I'm going to scare my roommate into locking herself in her room.
Why would you scare her like that?
I want to her back for telling people about my herpes.
She shouldn't have embarrassed you like that, but you shouldn't scare your roommate so badly that she'd lock herself in her room to get away. She'd probably call the cops and get you in real trouble.
Eh, it'll be fun to see.
I don't think the final outcome will be fun. You should just try to find a way to peacefully solve your problems with her.