Yeah, but the Asgardians are... how many? 500? 1000? and the police got pretty pissed when Balder and Loki killed a bunch of Giants in front of a human family (nevermind the fact that the family would have died without Balder's intervention).
I'm just saying, if your whole race has less individuals than pandas, and the individuals in questions are all super-powered and ignorant of Earth customs so that each of them could easily cause huge diplomatic incidents, then every member should be accounted for. It's incredibly idiotic for King Balder not to have a system to check daily for missing Asgardians.