I imagine it's because in the face of so many objectors who, for whatever reason, find fault in everything BJ or the government might do. Constant reminders do frequently work by adding impetus and reminding less convinced potential victims that somebody is still in charge.
As for the expense, if it alters aberrant behaviour in only 1% of the population then it's worth it. 1% of the population being 700,000 people!
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member no. 235
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