At Blender Stack Exchange if someone wants to share their .Blend with us, the community-preferred method is through Blend-Exchange, kudos to GiantCowFilms, Gandalf3, TenShrike, and mhsjlw.
Whenever a new user, or any user, asks a question including a .blend and ISN'T on Blend-Exchange we almost always request they do so. So why not do it for them? To clarify: Whenever a new question is asked that includes a .blend NOT on Blend-Exchange we auto-migrate it.
Cons, yep I'm starting with Cons
- Privacy - People may feel a little invaded if we switch their .blend hosting site without consent
- It's not legal
- Insert more cons here
No more asking to move .blend, just doing
This is just a guess, but it may encourage more people to download the .blend
File preservation - .blends won't expire
Insert more pros here
Of course, if the question-asker doesn't want their .blend on Blend-Exchange they can always remove it from their question.