I actually started with the plan of ending with a discussion of some of the self-referencing belief systems dividing programmers (eg dynamic techniques vs B&D practices), but ran out of steam. (It was late at night...)
However let me assure you that while TIMTOWDI encourages questioning how you do things, nothing protects anyone from falling into this type of trap. Not even being a Perl programmer. To the extent that you can be protected, one of the best protections is to be painfully aware of how easy it can be to flip the bozo bit on information that would change your views, and give the alternatives careful consideration.