I've also seen people do truly awful things with HTML::Template. Because of the lack of expressive power in the templating language "view" related code migrates back into the controller/model, making it a complete pain to change the layout.

What it comes down to (as always :-) is getting vaguely bright people to do the project who understand how to separate concerns, and then using whatever tool does the job best - be it HTML::Template, Template Toolkit or whatever.

(I do agree about the evil people do with Apache::Template tho' :-)