If you work with the public, that's pretty much normal.

I think it's an Aussie,thing.

Fox; your message is off topic too. :-)

Has anyone ever heard of SuNNyV8?
I got a weird message saying: "Hi, can I ask you something?".

How about replying and seeing what they actually want?

I dont want to sound silly, but could they hack my account if I reply?

no

Ok, thanks

No, don't do it! He will suck your brain out through the chat!

Ok, obviously that was sarcastic.

But was that? Not sure if I should have replied now...

Breja is yanking your chain. :P I realize it can be a bit offsetting when some stranger comes at you in a PM but I assure you, so long as you don't give them any personal information you are safe. Also, if they ask for a trade or a code or anything like that and you are unsure, just check in here before agreeing to anything.

Sorry, didn't mean to actually confuse you :D No, there is no danger in replying.

Most likely a mass-sent message.

Depends on if you're replying with your account information.
Picture related.

That's how I clean my keyboard.