pondering how to *responsibly* bring FTS to mastodon.
key points:
- FTS would be opt-in on a per-post basis
- Accounts would have a setting for the default opt-in/opt-out
- The opt-in/opt-out would be added as an ActivityPub message attribute
- A visual warning would be displayed for opt-out posts advising that the opt-in/opt-out only works for servers you trust, similar to the other warnings of that nature.