Re: Data from deleted users remains in wp_usermeta and wp_signups
It’s important to note that BuddyPress is an opensource project, just like all of the other WordPress related ones. That being said, if you find something isn’t working up to your expectations you are free to develop or contribute to the project to make it work how you wish. As it stands today, BuddyPress does a good job of keeping tidy and cleaning up after itself; better than most plugins in my opinion. The signups table is specific to MU and is a new addition, so you can expect it’s functionality to be misunderstood. When a user is deleted, the idea is that their signup remain in the signups table as proof of their previous registration. One could even argue that removing all user data is a bad idea in the event someone ever needs it later, say for law enforcement purposes.
Regarding blocking spam registrations, read some articles about Twitter. Some analysts have said that nearly 50% of all registrations on Twitter are spammers. Crazy eh? There just isn’t a fool proof way to prevent it from happening unfortunately.
Also, while none of the moderators are directly employed by Automattic, it’s about the best internship I think anyone in our respective businesses can hope for. We all do our best to represent Automattic and are here to help to the best of our abilities.
If you can find a specific bug or flaw in how users are currently managed between BuddyPress and WordPress, you’re welcome to respond here or file ticket in the trac. If you feel your opinion warrants more attention you can message me privately if you’d like also, and I’d be happy to help further.