2 guys i never heard of just showed up in my world. The first one whas named Steve and said something about that Corona is a diversion for something worse and something about "destruction 404" and when i asked a awnser he said he couldn't explain now and said "meet me tomorrow at 5pm Dutch time. I'l join your server. Then he left. A few seconds later another Guy named NPC(after NPC his name had some letters and stuf) joined and said "i'm warning you, something about a bug and that i should delete Minecraft, a virus wich makes lots of people enter my world and say "destruction 404," and then he left but before he left he asked me if i believe in Herobrine i said maybe and then he said he will come and a few ours later, when i whas preparing myself for my meeting, Herobrine joined. Well, i saw the notification. I whas far from world spawn point. And then i immediatly left the world. And then i came back and he wasn't their. What's wrong?