Not that I know of, perhaps someone else will know.
But do keep in mind that the default settings will mean that:
- if 3 users flag a post it will be hidden.
- if 3 different users flag a new user, that new user will be blocked from posting
- if 5 users flag to close a topic - it will be.
I doubt it will work and it might break - but you could try a number like 0.5 as the value for 30 minutes.