Does this violate the Patriot Act or FISA or the Fourth Amendment?

The Executive Branch and NSA have recently been under fire for collecting phone and email records on hundreds of millions of Americans – sans terrorist activity or probable cause or warrants/subpoenas. Do you believe this activity to be ethical/unethical? Should the government be doing this? Does this violate the Patriot Act or FISA or the Fourth Amendment?Instructions: Your initial post should be at least 250 words before sourcing