I for one would not mind if more projects that you are probably going to just use as a refrence instead of edit and re-compile would offer a "signed" version of the dll. That would help in trusting a refrence to an existing .dll quicker than checking the code and compiling your own.
In a lot of open-source project there is kind of a "Parent" of the effort, think Linus or even John Gruber for examples. These people could hold the key or distribute one to a trusted admin for signing major releases.