He reverse engineered SF's ticketing system to track officers in realtime

	▲	He reverse engineered SF's ticketing system to track officers in realtime(walzr.com)
		4 points by jgoon 11 hours ago \| 1 comments

	▲	ChrisArchitect 11 hours ago \| parent [-]
		[dupe] https://news.ycombinator.com/item?id=45350690