I think as bad as just the USA governments global spying and actions shredding the US constitution are the even greater damage is the encouragement the USA government policy gives for every other country to spy on every person, business and government across the globe.
I do believe the USA government is unlikely to have a huge amount of criminal information security spun off their massive spying efforts. But you can just look at all the examples of TSA agents (and others - that have been cleared by the TSA to work jobs inside the "security bubble") stealing from people forced to go through security theatre to see it is certainly possible for the USA governments actions are aid criminal enterprises including those by USA government employees.
Those risks are real. They will lead to damage to USA citizens. But they are small, I believe, compared to the damage USA citizens will suffer due to the mass increase in the global surveillance culture the USA has spearheaded the last 10+ years. Granted few countries have government so rich that they can afford to spend so much money on global internet surveillance and hacking (as the USA has done).
But there are at least 10 that have money and or resources that can do a huge amount of damage if they follow the USA's lead (lets just list a few China, UK, Germany, Japan, Korea, Brazil, India, Russia, Turkey, Taiwan). Some countries have more cash, some have large hacking (not just criminal hacking or government sponsored hacking but just software hacking talent in general wether for good, questionable good and/or questionably legal or downright bad definitely illegal) talent pools, some have large experience with large scale surveillance operations. and/or Certainly the USA has no justification to argue that any country can't do what the USA claims it not wrong for it to do. And the number of countries that could do a huge amount of damage with focused global surveillance and hacking is very large indeed and will grow going forward.
The result of the risks to everyone globally, including those in the USA, to the practice of massive government intrusion into private communications, internet activity, etc. of everyone is extremely damaging.
Related: Watching the Watchmen - Disregard for the Rule of Law by Government - NSA Spying on Apps Shows Perils of Google+, ‘Candy Crush’ - Little Watchmen - Freedom Increasingly at Risk