Actually, because the EventHandler has a reference to the class that created it (in most cases, and it's true in your case), then as long as it is referenced by the EventBus, it won't be garbage collected, and neither will be its "owner" class. There's no "dead event handler", only things that you no longer use but haven't destroyed, so they're still there, listening and handling events, without anyone to notice it (because your code no longer has any reference on them). You really should clean after yourself; onLoad/onUnload on widgets might be a solution; but having a real lifecycle for your classes would be best (this is where MVP shines through, e.g. the start/onCancel/onStop methods of activities)
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