Earlier this week, Martin Weigel gave a talk at the IPA 44 Club.
He's kindly shared the slides on his excellent blog, Canalside View.
It's a brilliant must read for anyone who works in the business.
And if you're looking for ammunition to shoot at the engagement evangelists, you can get your more than your fill. There's plenty of hard evidence and facts to keep you entertained.
Click here to enjoy Martin's words of wisdom.
PS Here is a little titbit - probably the best description of the ludicrous trend toward engagement nonsense we've seen, from Mr Brooker...