If the trunk contains personal information like social security numbers or access to even more personal or financial information, or more information to be used in identity theft... then yes, they would need to know what is in the trunk.
You have to look at both sides of the coin.
before reading this post, please answer the following questions:
What Color is a Banana?
What color is the sky?
What kind of store would you buy Food from?
Which DMS provider beleaguered their customers with stupid questions until they revolted?
No, it's none of their business what I put in my trunk. I can choose to leave my car unlocked if I want. Most people WANT a lock on their trunk and means to "secure" their vehicle and it's contents...but if I want to hand the keys over to someone else...that's my call. I personally would not purchase a vehicle where I had to tell the dealership what I was going to put in my trunk and get their permission to do so before it would open.
So...just so we are clear on this... If I purchase an automobile from a dealer...and choose to put personal information in the trunk... you think it's the dealerships obligation and right to come to my house and take it away from me or prevent me from accessing my trunk. I'll think I'd avoid that dealership.
I "collected" the personal information. I could have written it down on paper with a pen. (would Office Depot would come and take away my paper?) instead, I stored it in a computer. I have a license to use that software. I purchased the license to keep the information that I collect organized and secure but accessible. By secure...I don't mean from ME and other employee's or assigns that I collected the information for. Otherwise...it's useless to me. After dealing with that mentality, I'm sure more than a few dealers wish they had gone with paper and pen.
What's that noise? Sounds like a stampede of customers leaving. Last one out, turn off the lights.