Personally, as a person who hates guns and will NEVER own one, I am perfectly comfortable (in fact, eager) for everyone (including potential intruders) to know that I do not have a gun in the house.
I believe that criminals would rather NOT use a gun if they want to steal from you than to use one. . .as the sentence if he/she gets caught are so much more severe. And I believe that if an intruder KNOWS I do not have a gun, he/she will be perfectly happy to come in and steal my TV and computers without the use of a gun. . .or at least without shooting me at the first movement I make toward my side or towards my night stand drawer!
In fact, I read someplace (might have been in Europe) that the best thing to do if an intruder invades your home is to lock yourself in the bathroom and scream to the intruder "take anything you want and leave."
After all, most intruders do not come with the goal to kill you, not even to rape you (especially at my age!), but rather to get as much of your property as he can without any trouble.
And I much rather lose my TV and my computers than to shoot someone to protect material possessions!
Now. . .If I get shot some day. . .that means that "Karhma" is an hoax! But I do believe in Karhma. . .and I don't think I'll get killed, even if I lose a few pieces of gold jewelry and a couple of laptops from my home!