Let's say that a web page needs to show content according to various local sensibilities and that it's hosted by a 3rd party that does not provide server-side scripting. What to do?
The negative side-effect is that the search engines won't index your content. The positive side-effect is that the search engines won't index you content (maybe you don't like other people to use your content for their own purposes, e.g. keywordspy·com) and spammers won't be able to grab e-mail addresses from your pages ;)