I generally try to avoid being the interloper in such circumstances unless I am invited.
My thought as well...what would a “young couple” be doing in a parked car over an extended amount of time in the farthest reaches of a hardware store?
I’m always surprised to learn about the locations of homeless camps. It seems that they are all over northern VA. Some of them are so well hidden that one could go hiking in the summer and not notice one...but once the trees lose their leaves... *poof* A bit scary.