I carry a small caliber handgun with me, in a holster on my hip, and ask them if they are going to come back and wrestle, while I tap on the hammer of the gun...........
Actually, we put somewhat of a guilt trip on them, about how cool it is for the little guys to be on the same team with the HS kids. Just like they thought when they were little guys. Also point out the extra month of wrestling that they get in, to make them better for next year, keep in shape for some of the postseason national events, or keep in shape for FS Greco.