This may sound silly but some guy that I banned because he was hacking and he also kicked me off the server with a tool got butthurt and got the ip of the server and posted it in teamavolition's youtube channel comment section. All of a sudden a bunch of people from that post came in with ban histories of griefing and luckily, a stupid person joined first and told me where he came from before the swarm arrived. I also found out guests can break blocks now so that made the situation worse, since almost 20 people, all griefers, all guests, being able to break stuff, I had no choice but to stop the server. Me, I'm posting to let you know if you were wondering why the server isn't up when you check on it.
TL:DR
Please fix so guests can't build or break blocks.