As for the stated reasons for utilising Mastodon as a sign-on service, Bubbles seems to share my views:
Why Fediverse and not email/password login?
We don't want to manage accounts. No passwords to store, no emails to verify, no spam accounts to moderate. The Fediverse handles identity for us, and no single company controls it.
It's difficult to tell what you're hinting at so long as you're not being explicit, but if your concern is that Mastodon accounts permit multiple votes per individual, yes, that would be an issue. However there are few systems which afford a hard guarantee against that (though many might increase costs), and there are other ways of identifying coordinated or fraudulent voting patterns (talk with the HN mods about that some time, or any collaborative-filtering / collective-voting based discussion platform).
You've ignored it.
As for the stated reasons for utilising Mastodon as a sign-on service, Bubbles seems to share my views:
Why Fediverse and not email/password login?
We don't want to manage accounts. No passwords to store, no emails to verify, no spam accounts to moderate. The Fediverse handles identity for us, and no single company controls it.
It's difficult to tell what you're hinting at so long as you're not being explicit, but if your concern is that Mastodon accounts permit multiple votes per individual, yes, that would be an issue. However there are few systems which afford a hard guarantee against that (though many might increase costs), and there are other ways of identifying coordinated or fraudulent voting patterns (talk with the HN mods about that some time, or any collaborative-filtering / collective-voting based discussion platform).