Please request a Tag for Audience Exclusion from your Criteo account manager (the exclusion should be set globally for all campaigns).
Here is an example of what the tag could look like:
<script type="text/javascript">window.criteo_q = window.criteo_q || [];window.criteo_q.push( { event: "setAccount", account: xxx }, { event: "viewItem", item: "#ProductID#", userinfos:"frauduser" });</script>


