[TYPO3] Guestbook & Comment Spam protection?

[Nikolas Hagelstein]

Hi,
is there any addon avaible which protects
guestbooks and comment extensions from being spamed?
(e.g via non machinereadable number sequenz image)

Cheers,
		Nikolas


--
Nikolas Hagelstein
hauptsache.net GmbH
Ruhrstraße 11 - Phoenixhof
22761 Hamburg

fon 040  41 26 37 -30
fax 040  41 26 37 -37


"Linux is like a wigwam! No windows, no gates and an apache inside."