And I'm not talking a quick trip post-12/96. If you're familiar with Boulder, you'd have to realize a couple things. One....beauty pageants--let alone children beauty pageant winners are not exactly in vogue there. So....if you look at the victim (JBR), she would be a perfect kidnap victim.
Secondly, Pearl Street is not all that big of a geographic area. Anyone that spent any amount of time around the mall area, would have learned of Access Graphic, and JR.
Thirdly, Boulder has always been a draw for transcients---back in the 60's and 70's, it was a place where a lot of hippies hung out, strumming guitars and smoking pot, and dropping LSD. Boulder then evolved into a place with nuevo rich, and hi-technology companies moving in. Some really resented the "fat cats" that had moved in, driving up rents and property values, and they resented ostentacious shows of their money. It became a place of those that have and those that don't---not much middleclass in between. You have the University influence---with students and residents from academia. There has always been a fair amount of drugs.
So if you look at the Ramseys lifestyle, they would have been pretty visible. Add to that the article in the newspaper about JR's company making a billion dollars, and IMO, someone that he came across at some point in time, could have gotten an idea and/or harbored some kind of resentment. if they didn't know much about the family, once inside the house they would have seen evidence of JBR's participation in the pageants. I don't think they were close enough to be on a radar screen---they left handwriting, and called JBR "your daughter." The long rambling note IMO, is more like the mind of someone on methamphetamine....and the crime if you take it at face value, was that of an amateur.