While Disney may not tow you, the rule applies to everyone. If you visit another hotel, it is supposed to be a visit to that hotel (eating, touring, shopping). You aren't supposed to park there and go somewhere else.
How this works in practice seems to be debatable. I've never had a problem exceeding my time limit, while others report citings of tow trucks. But the rules do not allow you to stay at the Beach Club, but park at the Contemporary and go to the MK.