The bugzilla system does not really respect [[WP:ANON]] - the account creation here https://bugzilla.wikimedia.org/createaccount.cgi which is needed to report bugs on wikimedia's servers needs a valid(!) mail address. Users often have real name mail addresses while being pseudonymous on-wiki. Users who do not exactly read the message on the registration page can be easily tricked to disclose their real name since the email address will be public in bugzilla!
This is especially bad for people who do not speak English - or do only speak a bit. They could simply not understand what will happen with their email address. It is VERY uncommon that a email address which is required(!) for registration is made public.
Bugzilla links are spread in our projects in village pump discussions and so on.
Simple: solution do not make email adresses public and do not require email adresses for registration.