I need the ability to find several users who has been inactive for X days and delete them. This can be done easy by modifying the existing search functionality in ACP.
Also, we need some sort of option that allows us to delete with one action the results obtained into search query, like vBulletin does. On my small forums, I get a ton of spammers who create weird accounts like fGsd67Wq with emailfGsd67Wqemail@example.com and never post because they don't want to attract attention in the beginning. If this happens on a small forum, how do you deal with this issue on a large community?
The main features that are missing on the current user search are filtering the results with less than X results and an action to delete at once the search query results. I just cannot click on the red X for 100 users (yes, I got 100 new spam accounts recently).
Being able to search on IP and last visit date as criteria for pruning is most useful as well.