ProPublica hasn't asserted illegality — or, at least, that's not the main focus of their stories so far? Genuine, partly-rhetorical: Which of the PRISM stories

ProPublica hasn't asserted illegality — or, at least, that's not the main focus of their stories so far? Genuine, partly-rhetorical: Which of the PRISM stories that came out after the Snowden revelations asserted and proved illegality? IIRC, no one from the government nor any of the C-suite tech executives who secretly approved the surveillance were charged or convicted with anything. Looking at the lengthy Wikipedia article [0], I see that foreign governments said "nightmarish if true". James Clapper and President Obama himself acknowledged the existence of the program and defended it as passionately and robustly as any of the rich people defending their tax situations. Should Snowden/Greenwald/Guardian/WaPo held off on publishing the PRISM revelations until they had proof of criminality in hand? [0] https://en.wikipedia.org/wiki/PRISM_(surveillance_program)#Media_disclosure_of_PRISM https://en.wikipedia.org/wiki/PRISM_(surveillance_program)#M...