This is either a UX or User issue.

Probably both, Lemmy UX is quite bad, but understanding sub rules can also be a pain, it’s also true for Reddit

You can rotate throwaway accounts and/or use barcodes as a username

Aka. a combination of upper case i and lowwer case L

Aka

IlIIIllIlIlllI

I’m keen to see this grow.

A feature I’d really like to see is to allow people to use their own email domains, else they are somewhat vendor locked