Step 1 : Introduction to the question "2. What sort of tolerance do the police use as a way of deterring people from criminal activity?"
...1. Nil 2. Zilch 3. Nul 4. Zero "Zero tolerance" can be used to deter many types of criminal activity, from terrorism and drug use to petty shoplifting and anti-social behaviour. The meaning is very clear and concise in that crimes will not be overlooked.