Problem: There are over 800 WMF wiki's that cross-project contributors may use. Users may autocreate accounts on projects by visiting, however it only occurs by logging in to the project.
Proposed solution: Create a function that will attach an existing CentralAuth user to every project.
Who would benefit: Stewards, Global Rollbackers, Global Sysops, the Small Wiki Monitoring Team, and others doing massively cross-project support
More comments: There used to be a userscript to help with this process, however it is not compatible with current browsers.