The Noel Humphreys IP Buzz : Dedicated to commentary on copyrights, trademarks, trade secrets and patents and legal issues centered on software, knowledge management, outsourcing, virtual organizations, ASP's and contracts. This is NOT legal advice.
If police can follow you around in public in person, why can't they do electronically? That's part of the modern trend to substitute capital for labor.
Should a warrant be required to secretly track someone's movements with a global positioning satellite device?