In some cases your s_code is loaded but you don't want to fire any tracking. Would be beneficial to have a s.disableTracking=true; parameter to disable any tracking to go out.
While you would be able to put the s.t() call into an if-statement you would also need to turn of any auto-tracking and catch all s.tl()-calls and abort them.
A sample case:
if you don't care about saved copies of your site:
if (location.protocol=='file:') { s.disableTracking=true; }
would do the trick.
Currently it's a lot more code.
