Just to add, it was some years ago now but when I once agreed with a street chugger to sign up for a charity for the blind (I was happy to do it) besides other details, they wanted to know my age, and my phone number.
I declined to give the first, since it was irrelevant and none of their business, and the second, because I didn’t want anyone phoning me.
Chugger said OK then.
Several days later, I had a letter from said charity, saying they were ‘unable’ to process my ‘application’ (!) without this information.
The letter went in the bin, and needless to say, the money started coming out of my account anyway.
The barefaced cheek of it, though! Anyone would think I was asking them for money!