Mitch, I am a naturalized US citizen so the "Government" already had my fingerprints on file. The only thing I feel I gave up was long lines at the airport. :)
A non issue if you have TSA PreCheck. Worth every penny.
Example, I flew today and my backpack had a DSLR, 2 lenses, laptop, tripod, gopro, two external batteries, camera batteries, lots of cables, and other camera hardware. Got to security and took nothing out, left my shoes on and walked through without any problems. Money well spent. $85 for 5 years ($17 a year) why would you not?https://www.tsa.gov/precheck
Check out http://www.dynamicperception.com/ they have different levels of systems. The Emotimo can be used with their systems.