I was playing ROBLOX one day. It was a normal server of SCP-096 Demonstration by Brutez. A friend and I were the only ones on the server and were having fun and messing around when a Guest joined. It was called 'GUEST-096'. My friend and I started having a chat about him.
Suparover65 (Me): Look at that guest...
nadaladan (Friend): Eh, they can't talk, it shouldn't disturb us too much.
Suparover65: I think it's a hacker.
Suparover65: Can't you see? Look at its name! GUEST-096.
nadaladan: What's wrong with it?
Suparover65: *facepalm* It's in capital letters (not normal), it has a hyphen (not normal) and it says 096 (it would normally be 96)
nadaladan: right LOL. Wait, OMG
Suparover65: What is it?
nadaladan: GUEST-096, we're on the game SCP-096 Demonstration!
Suparover65: Eh, let's just ignore it.
So we ignored the guest and everything went back to normal for a while. But then the guest started talking.
GUEST-096: I Have Come Here For Medical Attention.
nadaladan: OMG WTF
nadaladan: DUDE WTF THE GUEST TALKED
Suparover65: OMG WTF? I HAVE COME HERE FOR MEDICAL ATTENTION? WHAT DOES THAT MEAN?
GUEST-096: Injured. Ambulance Picked Me Up, But It Crashed. I Was The Only Survivor.
nadaladan: Uh, sorry, but we're not doctors.
Suparover65: Yeah. We're just normal people.
The game then started glitching and there was a very loud static. I instantly muted my computer. The glitches started off with stuff like the walls briefly disappearing, then the map starting shaking, then things started turning red and finally the map exploded and I crashed.
When I clicked on nada's profile so I could chat to him about what he saw, it showed the error message that pops up when you click on a banned user's profile, except instead of builderman there was a guest and instead of the hammer outline there was a knife outline.
The moral of the story?
If you ever see a guest with capital letters, a hyphen or unusual numbers, leave the game instantly.