Currently, RealAuthor isn't ever purged, which is not only a runaway amount of space being used in uMod's database but also a privacy risk.
Somebody could vent and even a year later be deanonymised by a rouge staff member, etc.
Other tables which can be expired:
- PingProtectWarns (7 days)
- TempRole (self-expiry)
- QotdQuestion (self-expiry)