Yeah that's my concern, because if you start blocking accounts with softforks just because they are posting data to the blockchain, then the blockchain is 100% broken. Witnesses don't get to decide which operations have value and which ones don't. You pay the network cost to transact, you get to post the operation. End of story.

What if I start posting books to the blockchain or code from GitHub? Does a witness get to come along and tell me: "no! that doesn't have value!" ??? If they do it shows the entire system is broken.