4th WALLING: No please! I'd rather people didn't try to tell her she was fictional or recognizes anything about her life to her face.
THREADJACKING: DO IT, unless of course it's a locked thread.
BACKTAGGING: Into forever!

HUG: ...Sure, if you'd want to.
KISS: She'll slap you if you do it. Lady is married.
FLIRT: Go ahead, she'll either be flattered or really grossed out.
FIGHT: Sure.
INJURE: Only with prior plotting.
KILL: Only with prior plotting + cast approval.
TELEPATHY/MIND-READING/LOCATION SENSING: Yes, sure, if you'd like me to write you up something specific, let me know! Otherwise, go nuts.