[Moo] Mixins with events?

[Ryan Florence]

Is this a bad idea?
var Mixin = new Class({

  method: function(){
    // do stuff
    this.fireEvent('onMethod');
  }

});

var Widget = new Class({

  Implements: [Events,Options,Mixin],

    options: {
      foo: 'bar'
      onMethod: function(){
        // do stuff
      }
    }

});

Having a mixin that requires Options and Events?  It's conceivable  
that I person could try to use the Mixin without implementing Options  
and Events in their class.