I would like to propose the ability to add an IP address or block to the Blacklist on a temporary basis. Perhaps something as simple as an additional field when adding the address for "X" hours or days.

Often I find that a block of IPs are contributing to a disproportionate amount of spam not yet identified or caught by filters. Yet the IPs are from legitimate sources. It would be great to do a temporary block. Granted I can accomplish this manually, but it's time consuming to track and monitor.