Speed and impact on the user are meaningful differences. I don't like bikes in parks (except those designed for them) because the bikes are moving much faster than anything else. For that reason I might feel that a small child on a bike is more permissible than an adult. Also that the carried skateboard is not a violation - I understand the rule to be about vehicle use more than presence
> I understand the rule to be about vehicle use more than presence
Which I guess is part of the point - the rule specifically does not say anything about use, only presence - but people (including me) are still interpreting the rule with a "usage" axis. Perfect demonstration that the "simple rules for Internet content that are easy to apply" assertion has fallen over at the first hurdle.
