@benpate @rakoo @tchambers I agree 1,000% with this, put it in the servers.
If I Like something on a web site, and that web site has previously stored my preferred handle, just like it. Don't offer me an account picker, don't show me a page, just Like it.
If AP server B on platform C knows my webfinger, send it to My Home Server A and just. do. it.
Eventually this will be a Thing on non-AP web sites (and maybe in the browser), but we should focus on the main AP platforms for now.