The proper solution for me is to have the users change uids.
Until that can happen I'll just have the limit set lower.
Having done this a couple times when I switched from Fedora 18 to CentOS 7, it isn't as hard as it sounds. It involved (one at a time) changing the user and group IDs in /etc/group and /etc/passwd , then running a FIND command for each user, then group to change file ownership/group IDs. Time consuming = YES - it has to hit every file, ESPECIALLY shares on shared drives; Difficult = not at all. It was 'sweet'. By the way, the Users don't even know about it (well, unless one is logged in while your changes are taking place).
If interested, I can give you the two FIND commands (I got from another forum user, but perhaps not this forum - don't remember).