We are certainly not attempting to stop people reformatting LaTeX documents in any way they wish. There are many ways of customising incoming documents to your personal style that do not involve changing the contents of LaTeX's standard files; indeed, this freedom is one of the system's many advantages. The simplest way to achieve this is to replace
verb|documentclassarticle|byverb|documentclassmyart|
Nor do we wish to discourage the production of new packages improving on the functionality or implementation of those we distribute. All we ask is that, in the best interests of all LaTeX users, you give your superbly improved class or package file some other name.