Scaring drunk drivers off the road!

Last night around midnight the roads were quiet apart from a fair few Police cars out and about and some blatantly drunk drivers. Presumably that's what the police were out looking for - and good. People to take to the wheel, having had too much alcohol will at some point ending up killing someone and/or themselves. Why do people risk it these days when the chance of getting caught is so high?

One driver in front of me last night was weaving all over the place, and was obviously well over the limit, and drunk at the wheel. At that point there were no police cars about (typically). So i decided to do a bit of policing myself.  I accelerated quickly to get up behind the car in close proximity and started flashing the headlights as an undercover police car would do.  The outcome was that the drunk driver freaked out, and started braking and looking behind as though he had just been caught, and was going to lose his licence!  Acknowledging my job was done, i turned off. however hopefully this was enough to make the driver think twice next time and not get behind the wheel drunk!  Am i being over hopeful?

DON'T Drink and DRIVE!!!