Suppose I need Lasik surgery and see from a long distance. Assuming my eyes are very bad, and I need people to pay for my surgery, 3k.
What do I need to show if I open the donation thread here? Do I need to provide eye problems documents from birth?
Nothing can assure anything. All you need is trust/reputation from the forum users.
Reputation is key for receiving any donations, regardless of whether asking for them is allowed or not. If you're a nobody on this forum and start asking for donations for any of those surgeries you listed, you can forget about it. The only reason yahoo62278 received all the bitcoin he did is because of the trust and rep he's built up over the years. He's managed a lot of campaigns and a lot of money, so obviously people didn't think he was up to anything when he said he was in the hospital waiting for a heart transplant.
For as long as I can remember, asking for donations
wasn't allowed, no matter who you were. It was considered begging, and I was surprised to see a btc address in yahoo62278's thread. Eh, medically he's out of the woods for now and it's not a huge deal that he asked for a little bit of charity from the community IMO.