On: Feds nail webcam on utility pole for 10 weeks to spy on suspect

[superuser2]

Anti-stalking laws tend to require that the stalker be actively threatening in some way. Passive observation isn't generally enough to do it.

[Lawtonfogle → superuser2]

Significant amounts of passive observation without some explanation (such as the paparazzi following a celebrity) would qualify. It wouldn't be criminal (initially), but it would be enough to get legal intervention to be made to stop, especially if it had been documented to have been occurring for weeks.