Well they don't kick down doors, but they have picked plenty of locks. You probably don't need to worry about the Special Collection Service [0] though, unless you live in some kind of communications facility. The NSA's crypto programs are well known, but one area that gets very little attention is the part of the agency full of military personnel on loan from their parent services. Those people don't spend their day analyzing cryptographic functions.

[0] https://en.wikipedia.org/wiki/Special_Collection_Service