In reply to Goucho:
Why the snide comment? Setting your own rules and living by them is something much more essential than just deciding your style of climbing. This does of course not exclude listening to the expectations of others /society, traditions, etc.
However, taking all this into account you then have to decide about the rules by which you live. Every adult should always take full responsibility for all their actions.
Thus, should I then fall foul of what society expects of me (which I may or may not have taken into account), it is because of my deliberate choice, and I will have to face the consequences.
Saying a book or preacher told me to do something is a cheap excuse, be it climbing styles or anything else.
As for this discussion, if you need to learn not to thrash a rock from a book or a forum post you have problems beyond your climbing. Conversely, if you follow all "rules" uncritically without forming your own opinion and taking responsibility for your actions, you simply have a different problem.
With respect to climbing styles, I therefore do not take into account which style was used by someone else to climb a specific route, but of course will avoid damage, route hogging, etc...
Moving away from the climbing issue, many problems in our modern societies IMO stem form the fact that people tend to take less and less responsibility for their actions (yes it is also my car that contributes to climate change!).
CB