I have set up server side tracking on GTM and want to push these events into Mixpanel, the goal being that we can track all website traffic including those that have opted out of cookies by purely tracking "what" happened and not "who" (ie anonymous events for opted out users). My question is what is the best practice for inserting these events in MixPanel? Should we create a new "anon_[randomnumber]" distinctID for every event that we insert? Should we assign all events to an "anonymous" distinctID? Are there are any other options and what is the best practice?