Spaw, I know what you mean about ascribing meanings, and share your concern. The silly examples that come to mind are "Puff the Magic Dragon" being a dope song--no doubt due to the schoolyard parody, "Puff the Marijuana"--and "Rocky Mountain High" likewise being a dope song--gettin' high, man (said in the archtypal stoner accent). Some folks seem to have minimal clear sense in this area.

I was thinking of cases where the songwriter clearly had a nefarious meaning in mind. I can't think of any examples offhand, though I have a vague feeling that I've cases of it somewhere, somehow. But you're right, it can be detrimental to jump to unwarranted conclusions.