The BBC says that two daycares in the UK have started fingerprinting parents (BBC NEWS England Kent Nursery scans parent fingerprints), but I prefer the comments at Boing Boing:
English nurseries fingerprinting parents "for security" - Boing Boing
Two nurseries in Kent, England are fingerprinting parents as they drop off and pick up kids "for safety." Nevermind that statistically, your kids are far more likely to be snatched and/or abused by a parent (or someone who works at a nursery!) than by a stranger. On the other hand, giving out copies of your fingerprints to every weenie who's got a wild safety hair up their arse puts you at risk of having your identity snatched -- and the whole rigmarole just makes it harder for you to arrange for someone to pick up your kid if you're delayed, which makes your kid less safe too.