Don't take that for granted. Most will not. Can you blame them? I sure as hell won't. It's just asking for someone to rip them off. You would be surprised how much you can learn about a houses security flaws in a matter of a minute of being in that house. With all the reptile thefts that has been going on I wouldn't ever allow someone in my house to appease a sale.
I definitely don't take it for granted! He has taught me so much and been infinitely patient with a silly over reacting newbie.
I don't blame people from being cautious though. I don't have anything in my home that would be considered overly valuable (to others) and I still don't let randoms through my front door