I wonder whether the jewelry thing really has an overall negative affect. I'm not convinced the roaches care much. And I'm not sure a captive "decorated" roach doesn't end up getting more attention than the average hisser out there, and thus end up leading a "better" captive life. Nor would I guess that most hobbyists provide perfectly "humane" conditions for their colony pets. Again, not that the roaches really know or "care".
I also tend to believe that the more people are exposed to our pet bugs, the more aware they become that they're are not icky and dangerous. Consequently they are less repulsed by them. The less they are repulsed by them, the less other people (including their children) join in on the bandwagon of fear. The less people "practice" fearing bugs, the more open they become to being curious about them. The more curious they are about them, the more open they are to being more deeply interested in them. If live roach jewelry actually became more common, I'm convinced the average person would be less afraid of roaches and other bugs in general, since to most people a bug is a bug is a bug. Of course, it would probably cause the most fearful to become more fearful, but I'd guess the roach hate-o-meter would actually fall a bit, on average, and every bit helps!
When I think of bugs, I think of the most successful and diverse lifeforms on our planet. I can focus in on one species, its behaviors and associations with other parts of the ecosystem, or we can zoom way out and see the overall impact that bugs have on the planet. It's strange to think that there are more organisms living on and in your body than cells making up your body, but I heard it's true!
Peter