Facebook has won $873 million judgment against Adam Guerbuez, a Canadian man who floods the popular online social network with millions of explicit spam messages.

It is reported that Guerbuez fooled Facebook’s users to provide him with their credentials either by phishing to gain login information or acquiring it from third parties. After gaining access to user’s personal profiles, he used software to automatically send out more than 4 million messages advertising many “spammy” products, including marijuana and male enhancement ones.

Max Kelly, Facebook’s director of security, wrote on the company’s blog about the judgment as a clear warning to those who might be tempted to target the company’s audience of more than 120 million users:

Everyone who participates constructively in Facebook should feel confident that we are fighting hard to protect you against spam and other online nuisances…

However, the company admitted that like most spam judgments they may be never able to fully collect the award, and this would not end the battle against spam on Facebook.