I'm not a fan of that behavior. I can be pretty OCD so I find myself frequently going back and closing these nodes, because I very rarely need to get at the metadata.
It might be nice if those nodes just did not appear in the solution explorer at all - they could be in the Properties window instead. Alternatives would be to maybe have them under their own folder instead of Classes and Triggers or, if possible, to just not expand the tree node in the solution explorer on double-click. If these aren't possible, maybe a Collapse All button in the solution explorer would work.
Minor issue - just a nicety.