Scan New Posts For Hide Tags

[Dj Smuggla]

Im using a hide hack on my forum & its hard to make members use it, especially new members.

So is there anychance a coder could knock up a quick lil script, that scans a members post for [HIDE] tags when they click
'Submit New Thread'.

If there's no hide tags in the message area, the member gets a error saying 'You must use hide tags in your message'
& their post does not get submitted.

I've just found another site that uses something like this, check the attached screen.

Thanks