This WP SpamFree plugin is a nice idea for defeating spammers, but it’s not very robust. I subjected the plugin to some testing, and managed to defeat it with a commenting bot after only a few minutes.
So those of you who are using this plugin, enjoy it while it lasts. But once a significant number of people start using this, spammers will modify their bots to defeat the plugin.
I give proof here. The juiciest bits are redacted from the code so I don’t give the spammers too much help, but you’ll see how easy it is nonetheless.
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