in our case (a major online retailer), some of the problems are coming from the marketing department. we watch the data thoroughly, as we need each year to prep

in our case (a major online retailer), some of the problems are coming from the marketing department. we watch the data thoroughly, as we need each year to prepare for black friday, but after that some guy from marketing inserts through tag manager another tracker or any other crappy script that also heavily affects frontend performance. we actually care about that, but our options are limited. of course, if the performance is heavily affected we can tell them to buzz off, but usually it's not a single tool that generates the problem, but the sum of all of them. on the other hand, i'm aware that there's some value added by those tools.