To answer Weregoose's original question, I can't really remember anymore. That protection technique was added over a year ago, and I never got around to adding an example to explain what I meant. As far as I can remember, what James is saying is most likely what I was referring to. I wasn't aware of the DelVar XLbl 0 consideration at the time, but that would be relevant as well.
On a side note, I think the goal of a specialized wiki like TI|BD is "to go over in elaborate detail everything that may be overlooked." I agree that goal would be rather preposterous for a wiki like Wikipedia, but a specialized wiki just covers one topic, so it makes sense to be comprehensive in coverage of the topic. As a general rule, somebody should be able to randomly pick a page on TI|BD, and it would contain all of the relevant information about that given subject.
This gets back to the original goals of the site; in particular, the second and third goals:
Related to the first goal, the second goal of this site is to be the nexus for TI-Basic information. There are many different design concepts and techniques to learn and master, which are all part of the rich heritage of TI-Basic. Unfortunately, when programmers leave the TI community, they often forget to write down their programming innovations, and that information gets lost to the community. We encourage all programmers to contribute their TI-Basic knowledge to the community to prevent this from happening.
The third goal of this site is to present TI-Basic in a more connected and beginner-friendly format. The TI-Basic information is spread out across several TI forums, sites, and among individual tutorials and guides, and this problem is made even worse because of how cumbersome and confusing the information is presented. For a beginner TI-Basic programmer, it is especially hard to read through and follow. The result is a challenging barrier for learning TI-Basic.