I think calling it a "rule" with a "violation" is bringing in some emotional baggage that some people can't see past.
If instead of "does this violate the rule?" the game simply asked "is this a vehicle in the park?" the disagreement would be resolved.
Some people seem to interpret "does this violate the rule?" as asking something more like "is this a vehicle that shouldn't be in the park?", even though the rule doesn't say anything about "should".
But the question is not "is this a vehicle in the park," it's "whether or not this situation constitutes 'a vehicle in the park' for the sole purpose of what was the lawmakers' intent when they made a 'no vehicles in the park' rule."
A toy vehicle in the park most definitely is "a vehicle in the park." But prohibiting toys in the park most definitely wasn't the lawmakers' intent.
If you think a toy vehicle is a vehicle then you should have answered that the toy car violated the rule.
The way the game is framed as “interpretation of the law,” it includes the supposed intent of the law.