Sherman Austin’s buzzing cellphone often wakes him up as early as 3 a.m., with messages coming into his Long Beach home from the East Coast — there’s been another sighting of suspected immigration officers.

The 42-year-old computer programmer, who also drives for a food-delivery app, has spent much of his free time in recent months moderating stopice.net — which he created in February, “falling asleep on my computer like every night.”

Austin looks at every report that pours in from the public about sightings of immigration officers, about 50 a day from anywhere in the country. He uses various data to try and determine if the report is true. If so, he posts and texts it to those of his 25,000 subscribers in the area of the sighting; sometimes, he also puts up reports attached with “Unconf

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