I am okay with the Phins brining in Terry Glenn. There's almost no downside to having her in camp. She's a veteran, and could provide some tutelage to the younger receivers. After all, Hagan is the most tenured of the holdover Dolphins and Willford is the guy with the most experience on the team. What's one guy among 80, especially when a contract could be structured to account for his ailing knee, and when you have the PUP list to stash him on while he continues his recovery. I'd be okay with that.
Quincy Carter is another story. I don't think much of him as a QB, and don't see the upside. He just takes reps away from the other QBs in camp. Parcells himself said he "couldn't trust" Carter as the QB in Dallas when he released him. Why would he now? Sure there might be a veteran who *could* come in, but I just don't think Carter is the right guy.
But on the amusing side, if he did come in and took #17, you could have him throwing to Willford and Ginn who are wearing #18 and #19.