Suggestion: on the login page, show a link to Special:PasswordReset after entering incorrect data.
The participant experienced a problem that he forgot the password and could not find a way to reset the password. Such a case seems frequent and therefore it is important that we do not lose participants.
Usually the participant sees this:
But through, for example (to change IP), a Tor-browser, only this can be seen:
After incorrect data, there is no link to reset the password:
The participant reports that his IP range is blocked and through another IP he sees a usual page. He can edit without an ipblock-exempt flag. Registered participants are not always limited when blocking the IP range.