- For $50, you can get a NEXUS travel pass between the US and Canada. You just walk through the NEXUS line, no wait, no passport, no nothing.
- For $100, you can get an American Global Entry card "that allows expedited clearance for pre-approved, low-risk travelers upon arrival in the United States." Again, no lines and you just walk through. I believe it speeds things up for domestic flights too.
Both of these programs do a little vetting of you before issuing their passes. Worth doing, if you travel much. Definitely a form of profiling. These passes put you in the "guaranteed good citizen" catgory, same way that a carry permit does.