No DOCTYPE means you probably never went to http://validator.w3.org/ to check your code, but then if it's been generated by a software package (a)it's probably near impossible to correct HTML errors and (b) it will hopefully avoid the obvious mistakes like missing closing tags or wrongly nested elements.
Presence or absence of DOCTYPE declaration is used by some versions of MS IE to decide whether to behave in standard-compliant or broken-old-MS-browser mode when interpreting certain CSS properties - in other words, it can change the shape of your page.

"I have contacted JEREMY times several times, and pointed out the inadequacies of his website..."
How to win friends and influence people... I wouldn't appreciate that treatment either, unless it was something seriously wrong like a major factual error or a broken link.

Anahata