Hey all, I'm using the NMS Guestbook on clients site of mine, and we are using it because of a death of their family. The site receives probably 50-60 entries a day from fans/friends, and I need to figure out a way to embed some type of anti-spam / image verification script... Anyone know of anything? http://nms-cgi.sourceforge.net/
Given how basic an application a guestbook is why not write one yourself with the required CAPTCHA or equiv
If you don't know php much yourself, do a quick Google search for the keyword "captcha". This should explain how to set up an anti-spam input box (using php gd I assume). This would prevent spam
You could also (for a less technical approach) have a question that says something like: "Spell chair backwards" or "Add three and seven", and if they answer correctly, they can submit.
You could always moderate it...but at 50-60 posts a day, who wants to do that? However, you should be able to disallow html in your guestbook. It might cut back on spammers but not eliminate them.