Make check_url optional?

It is usually a good idea to sanitize URL's with check_url, but not in all situations.

Say I have this URL: <go href="http://www.example.com/?pid=12566&bid=123456&urlpath=http://www.example.com/prod/12000-some-product/">product link</go>

The resulting URL is http://www.example.com/?pid=12566&bid=123456&urlpath=http://www.example.com/prod/12000-some-product/

So &'s are turned into &'s by the check_url function.

It works if I remove check_url() from this line, in gotwo.module:

'content' => $disclaimer_time . ';url=' . check_url($result->dst),

To:

'content' => $disclaimer_time . ';url=' . $result->dst,

Should this perhaps be an option under the settings?
"[*] Include check_url (sanitizes your URL and for example converts &'s into &'s"