Does Toribash have the option to be able to insert the username of the current user into a text automatically? Ive seen this done of forums with a similar format as Toribash.

Examples:
Hey [username], read this before posting.
[username], be sure to read the rules before posting.

As far as I know, Toribash forums don't use/have this. The way you say it in examples is as if you are going to use it in Introduce Yourself. I'd prefer you to use custom message as it gives a more personal message to the beginners.