Hi engineeryourface,
The reason "Your email will never be published or shared" behavior is included with Thematic by default is because some people (spammers) and yet mostly machines (spambots) do unscrupulous things (like sending copious amounts of viagra advertisements) when they get our personal/private information (e-mail addresses).
I guess you could do what you're requesting but it's doubtful that anyone with privacy concerns would ever dare comment on your site if they knew you would share their private information in the open. Also hiding the information with CSS would be the wrong approach for this. It'd make more sense to do it server-side.
And yes, it does seem silly... but it's even sillier that I have to spend an hour a month cleaning the spam from my longest lived email address' inboxes.
-Gene