Better safe than sorry! An attorney advised me to post this. The violation of property rights can be punished by law.  NOTE: All nodes must post an OP_RETURN like this. If you do not publish an OP_RETURN, at least once, it will be technically understood that you are allowing the use of your hard drive for the storage of arbitrary data, generally recognized to be spam. I HEREBY STATE THAT I DO NOT GIVE MY PERMISSION TO USE ANY OF MY HARD DRIVE TO STORE SPAM. 

mempool - Bitcoin Explorer

Explore the full Bitcoin ecosystem with The Mempool Open Source Project®. See the real-time status of your transactions, get network info, and more.