Stopping double-posting?

[NotQuiteCockney]

Would it be possible to check if a new message is the exact same as the message before it? So that the same user can't accidentally post the same message more than once. It happens so often ...

(also, pmsl that you call me sneaky still - lolol!)

A leopard cannot change its spots, sneaky.

That's indeed a fact

Did you know that a fly's wing vibrate 340 times a second ?