If fans don't want the rules to be continually diluted -- and I count myself among them -- then they should be lobbying for player weight restrictions. The primary reason why these rules have become necessary is that players are bigger and faster than ever before, meaning that they collide with more kinetic energy than ever. There is a limit to the magnitude of force the human body can sustain without injury; it's simple physics. If we want the NFL to reasonably sustain the hitting of old, players must become smaller. But restrictions like these would be no more popular with fans, because fans have come to expect the clash of titans on the field.
Another possibility would be for the fans to demand that players be paid less, so that they represent less of a risky investment for teams. Obviously, the NFLPA would never accede willingly to such a demand, but if fans were willing to endure a year (or two or three . . .) of work stoppage, the union might conceivably be brought to its knees.
Still another problem is the periodic lengthening of the season (which fans clamor for). We are now hearing rumblings that the season will be extended yet again, possibly to 18 games. Each additional game added to the season exposes players to increased risk of injury, further endangering the league's investments. Fans either need to oppose the lengthening of the season -- which they won't, since they want more football, not less -- or else demand that the league either a) eliminate the gameday inactive list or b) expand the 53-man roster or both.
It's a delicate balancing act for the league. Players are more popular and paid more -- they're higher visibility -- than ever before, which means they're also greater investments than previous generations of players. It makes no sense for the league to risk its most precious resource on eye-candy plays.
Frankly, I think if coaches
demanded that players learn how to tackle properly and benched them for not performing to standard, a lot of catastrophic injuries could be avoided in this league. But who knows when that will happen.