Pligg is an open source CMS (Content Management System) that you can download and use for free. Pligg CMS provides social publishing software that encourages visitors to register on your website so that they can submit content and connect with other users. Our software creates websites where stories are created and voted on by members, not website editors. Use Pligg content management system to start your own social publishing community in minutes.
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One trick that spammers use to mass post to Pligg sites is by creating a lot of accounts. What is annoying is that there isn't much that we can do to block these account creations if we can't discover a pattern to them. Your best option to prevent these bot accounts is to rename the register.php file to something random. You can even go one step further, and frequently keep renaming the registration file which really would throw a curve ball and make life more difficult for spammers.
Pligg becomes a place where brainstorms can be propelled or quelled in an instant by the type of voting and ranking system that has made Digg such a hit among consumers.