There were no complaints from anyone - I wuz just doing me job guv, in line with forum policies.

I hadn't used the button before. When you ban a user you have choices of what kind of Ban - Full Ban, Cannot Post (or PM), Cannot Register.
You can also ban by username, email address, IP address or Hostname.
And a ban can be set to expire in a number of days, or Never.
The mesage presented to the user is a system message over which I have no control - except I can add text to it to inform the user why he's banned (which I didn't in this case).
Want me to ban you Peter then you can see how it looks too?
