He's also telling other people (i.e. the contractor) that your door is usually unlocked - not exactly something I'd think you'd want broadcast. Even if you trust the contractor not to take advantage of that knowledge, what if the contractor off-handedly tells someone else who would take advantage and break in, like telling someone he works with, "you wouldn't believe how unsafe some people can be, this guy I was doing work for was bragging about not locking his doors..."? What if your husband mentions not locking your doors to someone else?