GeoCaching is fun.
Fun things become more popular.
Popular things become bigger.
Bigger things get more recognition (both good and bad).
The bigger it gets, the more "issues" will appear and the more people will try to regulate it.
I will hate to see the day GeoCaching loses its self-regulation, however, it will gradually be overcome by bureaucrats and well-intending organizations created to save us from ourselves.
As GeoCaching draws more and more people, it will become more and more economically viable and financeering predators will commercialize it, making it even more succeptable to regulation, and it will eventually have as many rules and regulations as a meat-packing plant and will be about as fun.
Anyhow, I digress.
I love GeoCaching and I hope it never changes.
(Watch out, though...it will.)