I hope you can appreciate Admin try to keep on top of the spam posts we're being hit with of late, but there's only so much that can be done when they're posted over the weekend. You'll see they've been removed now.
This is (and will continue to be) a free-to-access site, but there's not much that can be done on the current platform if someone wants to create an account and post erroneously. We contact the account creator and remove the posts every time. Obviously the developers of the new website are well aware of the issue and looking at preventative measures.