What do you think of me thinking Roy Orbison was blind until a few years ago?
That is strange. What made you think Roy was blind?
There's a rumor about him playing in a dark concert and his brother is the only one who saw him play
You shouldn't put too much stock into unconfirmed rumors and hearsay. Until you have found a reliable source of info, you shouldn't assume things of others. It could hurt someone.
I would rather not look for sources. I'm having fun thinking he is blind.
You can do that if that's your choice, but you shouldn't spread rumors around. It could hurt someone or make people think you are ignorant. You should be careful in the future about listening to gossip.