Trading Standards told me their anti-cold calling campaign is already off to a great start, with hundreds of thousands of people downloading the "WARNING" notice to put in their windows.
TV presenter Gloria Hunniford is spearheading the campaign, and she has met many people who have been conned by unscrupulous tradespeople.
As she explained to me, the worst case she has come across is a man who lost more than half a million pounds, after trusting conmen who persuaded him to have a huge amount of unnecessary work done to his house.
Thankfully, the criminals are now behind bars, but the victim only got back a fraction of the money stolen from him.
More top news
The Hollywood star reportedly looked like he "switched into superhero mode" as he chased the suspect near his home.
Zipporah Lisle-Mainwaring painted red and white stripes on the facade of the three-storey terraced building in Kensington in March 2015.
A British Transport Police officer said his broken nail amounted to assault but failed to offer any evidence to explain how it happened.