See T303995: Instrument blocked account registration and edit attempts for context.
We're aiming to answer questions about blocked account creation like the ones listed below. This list is not exhaustive and we'll likely add/edit it along the way.
- What countries are more likely to be blocked? (One idea is to relate blocked account creation attempts to page views in order to identify higher-than-expected likelihood of being blocked?)
- What kind of blocks (local/global, short-/long-term) are more frequently encountered?
- To what extent are we blocking bot account generation? (e.g. frequent block encounters by same IP & user agent)
Whenever an anonymous user visits Special:CreateAccount and is denied access with a block message, log an event
- local IP blocks
- local autoblocks
- global IP blocks
Not in scope:
- other methods of denying account creation (AbuseFilter, DNS blacklist, TOR blocking, throttling...)
- block type
- block ID
- user IP
- user agent
- API or special page (if we instrument the API as well)
- platform (desktop/mobile if special page, might be combined with the previous one as a platform field with API/desktop/mobile if that makes sense)