One of our based operators also operates the local police helicopter.They rarely seem to go below 1000ft over built up areas, and given the level of technology on the helicopters these days, it is rarely necessary. However, I wouldn't be suprised if they have an exemption to do so if it's operationaly required.
I hope that your reference to cowboys doesn't mean the crews who do this work. Not only are they very good pilots, they're also very dedicated, and very highly trained, having to maintain these high standards to keep their jobs.