Name and shame. You'll need to find some influencers on Twitter/Instagram/FB who have a following among the Mexican website's audience. Post an article detailin

Name and shame. You'll need to find some influencers on Twitter/Instagram/FB who have a following among the Mexican website's audience. Post an article detailing all the copyright infringements. Promote it on social media and hope the owners and the readership cares enough about content piracy.