My real point is, if you use a service to provide your own service, you give them your blessing to do whatever they want with your brand. This includes facebook and their tracking scripts.
Thus we need to audit what our service providers are doing and limit their impact once we've completed the evaluation, making sure they don't alter the deal later.
Also tracking ad conversions is as simple as using a unique parameter per campaign, when buying the add. Just append `?campaign=facebook_campaign-name_202202` to your link and that's enough to measure the ads effectiveness. No need to attach unique ID's to users, sessions etc... Aggregates keep the users anonymous and give you enough actionable insight.