The experiment is bad because it has hopelessly convolved a number of different causes of disagreement, some of which have nothing to do with difficulties in mo

The experiment is bad because it has hopelessly convolved a number of different causes of disagreement, some of which have nothing to do with difficulties in moderation. If you're interested in "people disagreeing on what should be allowed", then you must state the rules in a way that allows them to establish the intent of those rules. Instead the experiment was not evaluating people on their ability to agree on the intent of the rule "no vehicles in the park" but on their agreement over the meaning of the rules of the experiment itself. Since these rules were intentionally left hidden, you should expect there to be lots of disagreement on what they are. Which was evident in the original comments section.