and similar. I'm seeing a lot of images like this shared around uncritically by well-meaning friends during Pride Month, and I would like to challenge them. I thought I'd seen a good take-down of these on Twitter, but of course now it's disappeared into the aether.
See also the recent well-publicised 'you have a big sister!' solicitation from Munroe Bergdorf, and Rachel McKinnon's 'join my glitter family' post last year.
So. 'Safeguarding issue', obviously - the adult having secret, possibly embarrassing knowledge about the child puts the adult in a position of power. An adult intending to abuse the child could leverage this power quite effectively.
Special, secret friendships with cool grown-ups are how grooming starts.
There was another argument/principle to do with, iirc, creating a culture. IE if I invite troubled minors to contact me, I help them, I am an ethical person, all is fine for the individuals and no-one has been abused, but I've still breached safeguarding by normalising the behaviour - so when a predator next solicits children to contact them, 'it's fine, everyone does it'.
Can you think of anything else?