[carpeperdiem]

You can put any old logo on your site... but if you're not licenced to use it, you are stealing.

The POINT of a secure cert is to VERIFY the identity of the site and its owner. If you don't own a Comodo cert, then using the logo is meaningless. If a visitor were to hover over the cert or click on it, your site wouldn't be identified as secure, and the visitor would know you're a scam... so are you better off for stealing the image?

The point of the logo is CONFIDENCE... confidence in your site, and confidence in the SSL technology... and the ability of your customer to verify that the place they are giving their private info is indeed your site. The moment you blow that, you might as well be selling out of a pushcart.