After an application of locktite when my rifle was new, I have not experienced any loosening ejector bolts. However there seems to be enough posts of others experiences to imply that we may have a minor issue here. It would seem a simple yet robust fix would be to add a retaining tab to the ejector plate. After installing and tightening the ejector bolts, one would simply peen the retaining tab flush to the bolt face. Seems like a simple fix the factory could add to eliminate any possibility of the bolts loosing up, yet still allow the ejector plate to be easily serviced / replaced.
Example retaining tab:
The ejector plate:
Example retaining tab:

The ejector plate:
