Pawoo.net is one of the largest instances of Mastodon, but it is quite outdated (insecure) and recently I get many follow requests from different accounts with always the same avatar pic (probably spammers).
@ij On my Friendica instance I blocked them because of the massive unrelated contact requests when they opened up. Some of their users (Japanese only postings and profile) were on "contact shopping trip" back then, subscribing to every profile they could find.
@bavatar - I blocked them on Friendica as well.
Nonetheless I think it would be good to also check against outdated versions of $software and exclude them from federation.
All friendly creatures are welcome. Be excellent to each other, live humanism, no nazis, no hate speech. Not only for nerds, but the domain is somewhat cool. ;) No bots in general! (only with prior permission)