Just so we can stop hijacking the Catalyst Situational thread.

Heres wikipedia
http://en.wikipedia.org/wiki/Security_clearance

Most violations are not going to be the death penalty or treason. However it is not unheard of to make you sign a waver saying that if you do X violation you will accept the maximum penalty by law.

To use Shadowrun
Confidential Level - You know that there is a Shadowrun team that does corporate espionage
Secret Level - You know who the runners are and what corp they are after
Top Secret Level - You know all the details, how long they have been looking at the corp, what security there is, what gear the runners have, etc

Giving up TS (or even S) information could be very bad for our runners and thus why it is a serious matter but not always treason, just depends on what info you gave up.