I'm not going to preach, because I've been guilty of leaving my gun in the car on numerous occasions and I admit that it's a bad habit.
I know I'm being preachy. But dammit, these are not pocket watches, they're firearms. And somehow, some people think that if it's an inexpensive gun or one they don't mind losing then it's okay to leave it out..."it's just a truck/boat/camp gun so if it get's stolen it's no big deal." Or, "it was [insert flimsy excuse of your choice here] to bring it in the house last night."
I'll bet money that if everyone knew that if their gun was stolen it would be used by a bad guy on a member of their own family, these attitudes would tighten up pronto. But stolen guns disappear from sight, they get used on other peoples families. Your gun could impact my family, that's why I'm being preachy, I'm sick of the irresponsible behavior.