It's clear that if you have a modern editor, block comments are unnecessary because it is trivial to add a # to the start of each line of a block, but that doesn't really answer your question. It explains why you might not always need block comments but doesn't explain why you shouldn't use them (especially in a primitive editor).
The danger with block comments is that there is no way to tell that the code you're looking at has been commented out unless you can see the start or end of the comment block. If you have a modern editor, it probably changes the color of all commented out code to eliminate confusion. But if you have a primitive editor it does not. Also, even people who use modern editors sometimes browse source code using a plain text viewer (less/more). Eliminating block comments eliminates uncertainty. :) -- http://mail.python.org/mailman/listinfo/python-list
