[BNM] *n?x : cron management question

[Pete Dowdell]

As root, I think it would be pretty useful to be able to see all the 
cron jobs set up for all users on a system.

I can't find a command to do that, other than building a command line 
pipe or script to process /etc/passwd and pass that to crontab.

There must be an easier way to do this!  Is there?  Can anyone help out?

Thanks,  pete