Sorry to hear about that. It seems like an easy fix on Axiom's part. There are 4 holes already on the mount around one in the center, on the bracket. If Axiom simply put 2 to 4 corresponding bolts on each speaker then everything wouldn't be counting on that one bolt holding the speaker up.

This is kind of the same problem as when people mount porch swings. They thread an eye bolt straight into a ceiling joist on each side and that's it. If one of those bolts fails then everything comes crashing down.