I did only test that very briefly. It appears to work, but I don't know if it has unwanted side effects.
So the big question is, are there reasons why this currently isn't done?
I do think, that lazy loading has its place, especially when combined with Ebeans auto query tuning. In one test I had a page that generated >400 SQL queries per view due to lazy loading. Within a few minutes, Ebean's query tuning converted that to a single query per page view.