Yes, the OE plastic ones on my Jeep didn't last long before they started clunking. I don't believe that had anything to do with the plastic though, just poor bushing material. Spraying oil on them every month or so would quiet them down.
A place that's essentially a Jeep shop, having a junkyard full of old Jeeps, put new steel ones on and siad I would never have to replace them again. That was about 3 years ago. The're "good".