For most purposes, 1/√N where N is the sample size is a reasonable estimation for margin of error. So for 82 people responding that makes about 11% which isn't too horrible generally.
So what that means is since the Bills came in at 19% in the survey there is a 95% probability that between 8 and 30% of the players in the NFL feel this way.
This assumes, of course, that the distribution of the players surveyed is reasonable.
The reality of the situation is though, that this probably only applies to players that have a choice (good players). Players being cut today for example would gladly go to the Raiders, Bills, or anyone else.