Not even a billionaire can escape the brewing backlash against Flock Safety.

Chris Larsen, the crypto billionaire and Ripple cofounder who helped fund the expansion of surveillance tools in San Francisco to help address crime, said he’s getting flak at home over his backing of the tech. On an episode of the podcast “On with Kara Swisher” published Monday, Larsen said his 19-year-old son has called him out.

“He always gives me a hard time — ‘I can’t believe you’re doing this surveillance thing? What are you doing?'” Larsen said his son has asked him.

When Larsen responds that surveillance has helped cut down on crime in San Francisco, he said…