I think the point will be selective enforcement. Make a completely unreasonable request that travelers are unlikely to perfectly comply with (even if inadvertently -- do you remember your Digg profile?) and later enforce a penalty at your discretion. Soft-totalitarianism.
>>murbar+(OP)
I've always liked the term Anarcho-Tyranny for this type of thing.
It's the biggest reason why I am a huge fan of the idea of mandatory prosecution. If we can't afford to prosecute all the crimes we have on the books perhaps we have too many crimes on the books