I've never been a master at the technical side of bitcoin. I know enough to explain to new people why they should embrace it in political discussions and that's about all.
Recently I learned that other data is stored in the block chain. I got to thinking: What stops someone from putting child porn for example and screwing over many people who would then have a copy stored in their blockchain?
We visited this issue a long time ago. I believe someone added a link to some tor porn image. If it was child porn I do not recall.
This was years ago. Some people made a big deal out of it. Nothing came of it. The law they figured out that it was no big deal.