Monitoring a larger list of sites is a bit cumbersome as the siteID cannot be changed in matomo. Even better would be a TAG instead of an ID
ie: siteid=mysite_frontend instead of siteid=43
ProtectTrackID is cool , but as people see the url already, I am not worried of the url repeated or something. The use case is mainly for developer/admin readability. When maintaining X sites I have to make sure that the ID in the js matches the ID in the backend... a tag would be easier and more memorable
You could ask if the creator of ProtectTrackID would consider to add a feature to specify a custom tracking tag per site or you could look at how that plugin works and develop it yourself in case you are familiar with PHP https://github.com/joubertredrat/Piwik-ProtectTrackID . For sure some other people would find this useful as well 👍
Not sure if it would be integrated into core.