The motivation for this question is the fact that at the moment, the 2014 FIFA World Cup is in progress and a number of decisions made by referees have been hotly discussed elsewhere on the Internet.
Obviously, the majority of decisions made by a match official in a given sport are based on an application of the rules of the sport to a given opinion held by the official at the time of the incident. However, after the match, with multiple camera angles, replays, etc, it's often a lot more clear cut what happened, and it may be possible to make a mostly objective assessment as to whether the decision was correct, and if not, what the correct course of action may be.
Even if we can remove the "primarily opinion-based" hurdle, are these questions then at risk of being "too localised"? I'd argue for high profile matches in a given sport, which are of interest to the majority of followers of that sport, these questions are certainly not too localised, as they're of interest to a wide range of people.
So, to sum up, are questions regarding specific match official decisions in a particular game on topic? If your answer is not a clear-cut, yes-no answer, which are allowed and which are not?