Template:Unlocked userpage
By default, anonymous and non-confirmed users are disallowed from editing others' user pages (by filter 122).
Usage
Place {{unlocked userpage}} anywhere on your userpage. Note the filter looks for the exact string {{unlocked userpage}}; do not change the capitalization or spacing as you would be able to do with other templates. Hiding it using <!-- {{unlocked userpage}} --> does not work, and is pointless since the template is already only visible by viewing the source text of the page.
Only stewards and you as the user page owner are permitted to add or remove the template from your own user page.
This template does not have any visual effect as it only works as an exemption from an abuse filter rule, and only works on the base user page.