After spending the day at a University job fair, one thought continually entered my mind.
handshake: soggy + limp = repulsive
I've never considered using only this simple method for candidate screening. Sure, a bad shake has bothered me before but now is the time to take a stand. Do you want these people spreading their clamminess in the name of the company?
Here is a good article about what a handshake can tell you about a person.