How do you handle spam registrations?

I switched the cache store to Redis and the ACP feels snappier now.

Code: PHP

define('IN_MYBB', 1);

— always check for this guard in your own plugin files.

Make sure you take both a files and a database backup before upgrading.

Spam registrations dropped to nearly zero after enabling a good Q&A challenge.

Curious what everyone else here thinks about it.