I think the correct approach would be to either fix the errors or not use the plugins generating them
Arrrg... You are completely right, but...
Unfortunately for many of us those error messages have grown to a magnitude, so that fixing them all would be extremely unpleasant. A very dangerous combination are users like me, who are collecting a lot stuff, plus have reached a more experienced state to be less carefull or to put things into question, plus are too lazy to solve the resulting issues.
For instance: A nice scene I would like to try out but with dozends of dependencies that I really don't want! No need for that unoptimized 300 MB skin or those ugly clothings, I will use my own stuff anyways... BANG: some more error messages.
As you may know, I was one of those being skeptical when it came out, and I am actually in a process of disliking the "new" sharing system more and more.
It is very likely that this is resulting from me and others are not completely understanding it, or don't use this "in the right way". But IMHO a good tool should take this into account.
Please ignore my little rant, because I admit that this system is still better than what we had before. But...