If you use [[module NewPage...]] to create a new page, that works fine for ordinary pages but does not work when trying to create a live template page. For example, you enter user:_template but it creates a page called user:template. It strips out the leading underscore. The live template doesn't then work. This causes confusion for all users, particularly new users who are less likely to notice the error than those with more Wikidot experience. The confusion is made worse by the fact that the page title still shows the underscore.
An example of the confusion this causes is shown on the community forum at the second half of the thread at http://community.wikidot.com/forum/t-270207/turning-toc-into-a-url-link#post-884020