At this point in time, I'm leaning towards limiting rather than blocking on the main blahaj.zone. Lemmy and kbin don't allow silencing, but are also unlikely to federate with meta instances in the first place, so I'm not sure what we're going to do about them.
Blahaj Lemmy Meta
BlΓ₯haj Lemmy is a Lemmy instance attached to blahaj.zone. This is a group for questions or discussions relevant to either instance.
Facebook used XMPP to entice users to befriend Facebook users, then when they had enough market share they killed support for XMPP, forcing everyone who hadn't yet joined facebook to join or lose their contacts who were on Facebook. There used to be times where you could just use Trillian to talk to people on multiple platforms (including MSN and Facebook) at the same time, and that died off as the walls grew taller.
ActivityPub is a competitor to Facebooks walled garden. I would not doubt they would try to try and cannibalize it.
I miss when trillian or a well configured Pidgin client was all you needed to talk to EVERYONE. Now half my friends have telegram, three have Facebook, the normies insist on sending me exploding videos on Snapchat that start playing muted so I canβt even hear what they are trying to say, then work wants me to use the crew app, friends want me on discord, I just want to use session.
Is a mess
If the consequences you speak of are correct, then this would be a big issue.
Many of us intentionally do not use meta products and would not want meta doing anything with our information.
Lemmy/kbin should be a "safe place" from for-profit mega-corps.
I'm neutral on the whole question, but AFAIK everything you post on the fediverse stays on the internet forever (even if you delete it from your instance, it doesn't necessarily get deleted from all instances) and is indexed by search engines and the like.
While I don't particularly want content from Friendface cluttering my feed, I'm not sure what (if any) effect defederating from hypothetical future Meta instances would have. Perhaps someone who's been around here longer than me could chime in please? :)
Defederation cuts off the connection between two servers both ways. In this case, it would actually prevent facebook from harvesting data from these servers, and the server would not get any of the facebook server traffic.
That all being said, the objection to facebook joining the fediverse is partly a moral one, and a fear that facebook will try to EEE the fediverse (as in, embrace, extend, extinguish) like they did with other protocols.
There are obviously lots of reasons to be skeptical of meta, and to consider not federating with them, but
it would actually prevent facebook from harvesting data from these servers
isn't the case. They can already mine data it if they really want -- lots of folk set up bots to scrape mastodon data.