A quick primer on how keys and frames work in FC.  During sign up: 

1. User creates eth key on their phone.
2. Warpcast creates account key on its server. 
3. User approves account key onchain 

Eth keys can hold funds and can control your account. Account keys can only post messages from your account.

Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

I think enabling AA at scale is the most advantageous and can limit user first party wallet risk

That said,  simple tx like send would be nice from the user account.

Makes it easy to top up an AA acc while preserving security

I think mobile<>mobile has the highest risk vector