We've designed it so it's nearly impossible in Warpcast: 

1. Frames only interact with Farcaster account keys (EdDSA keys) and never with Ethereum keys (ECDSA keys) 

2. Frames are sandboxed and can only render markup, making it very difficult to jailbreak

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

Wrapped Ether

(revoking a key does have side effects, to rotate it's best to add a new key, sign your old messages with it, then remove the old key)

Yes: https://docs.farcaster.xyz/reference/contracts/reference/key-registry#remove