If you get on the bus with it, wouldn’t it not count as “separated from its owner”? Your phone, after all, sends out these pings as well even when off. So, the tag may know it’s with the phone even then. Also I don’t think it has to be “marked as” lost. This stuff doesn’t depend on anything that the owner of the tag gets to configure, since the point is to make it harder to abuse this way. I do think it’s dumb though. A real GPS tracker is not expensive - this stuff is only deterring the least-dedicated stalkers.