Am sure opting everyone in has backfired somewhat.  I recently purchased an item from an eBay seller and as it was a bit cheaper I opted for Click and Collect with Inpost.

Sadly the seller, who probably didn't realise they had been auto opted in, dropped off the parcel at an Evri parcel point.  Of course it's now lost.  I was refunded but am sure there will be a lot of unhappy buyers and sellers.