I have just spent some time reading through this thread and there are some good ideas floating around.
On a personal level I am a big collector of Knights sigs but find it difficult to get them in person. I rely heavily on the good people who utilise this site as a means to fills holes in my own PC, and if I see something I really need on Ebay then I'll grab it if I know the seller. I know there are others here in exactly the same boat.
The wristband is a great idea in principle, however I also agree that those who want to abuse that system would be able to do so. I also think that limiting players to signing a few cards would only encourage the sig pigs to get more kids to ""work" for them. It may have a small impact but I don't think it will fix the problem. From the players perspective, I'm sure they don't want to disappoint anyone by refusing to sign.
I think that the key to making something work lies with the players being able to recognise who is a genuine collector and who is in it simply for their own profit. To build a little on the wristband idea, how would people feel about establishing something like an NRL Collector's Association (for lack of a better title). I understand it would take some work as there would be complications, legalities, agreements etc etc to work through, but if it was set up correctly with some ground rules, proper administration (I mean official website, newsletters and the like), it could work.
In my mind members would be in possession of an individually numbered photo ID card that could be presented to a player if required. It could be run by some reputable people who know the industry and how it works. Communications could be made to clubs advising the players of what to look out for. Persons in possession of an ID card could get priority and maybe some kind of special access to the players (but still limit the number of cards), and all other requests can be facilitated completely at the players discretion. Rules of the Association can be determined by the members.
I imagine that initial members would need to have "runs on the board" as far as being in it for the right reasons. We would have members in all areas (Sydney, Newcastle, Brisbane, Gold Coast, New Zealand and probably even Melbourne).
This is all just off the top of my head at the moment, but you can see what I mean. I would be happy to sit down and discuss how to move forward if anyone was interested in picking up the ball. I'm sure we could get a few members from here who would be keen to contribute.
At the end of the day I think we need to keep as much integrity in place as we can and give as much power to the players as we can at the same time.