"It's okay when we do it" is so rampant on political forums. They instinctively react against anyone bringing up 'Whataboutisms' and 'slippery slope', like they are taboo arguments.

People are far too willing to take significant risks just to get emotional gratification and appease their own outrage. Usually it's delivered with a blind trust in the system (the sort of trust you'd normally never hear re the police), that it will somehow be used mostly for good, the scope won't expand indefinitely, and the false positives are just a cost of doing business.