Any laws like this should always have a sunset clause, otherwise they are open to abuse. For instance in the UK local councils have used terrorist powers to see if people are trying to game the school catchment system to get into a better school [1]. And also used to spy on Fisherman [2].
[1] http://news.bbc.co.uk/1/hi/england/dorset/7343445.stm [2] http://www.guardian.co.uk/uk/2008/may/14/law.humanrights