This doesn’t sound good; making ActivityPub integration opt-in (or opt-out wholesale) just means nobody is going to opt in, and there will be no easy way to ask or convince accounts to do so. You will lose a lot of the value of interop immediately, and if somebody has a bad interaction with a Mastodon user they might cut off access entirely with a toggle switch. Block people, block instances, but no master switch or all this is for nothing @mosseri