I don't think anyone's being an @rse - gav's post was a reference to my shoddy reading of the OP (because black holes are f***** ace).
Like anything else, if you've got the ability to upset other road users then you should use it responsibly. Just because my car has a full beam setting, I don't drive around with it on all the time. Similarly, I've got a flip-off bike light, but I only use the settings that are appropriate to the conditions. If there's an approaching car or pedestrian, I'll always dip my lights (by nudging the light downwards or lowering the setting - usually both). The only time I'll deploy full and righteous lumens with an approaching car is if they fail to dip their full beam, just as I would while driving. They usually get the message, and when they do I'll dip mine so we can both see where we're going.
Like anything else, if you've got the ability to upset other road users then you should use it responsibly. Just because my car has a full beam setting, I don't drive around with it on all the time. Similarly, I've got a flip-off bike light, but I only use the settings that are appropriate to the conditions. If there's an approaching car or pedestrian, I'll always dip my lights (by nudging the light downwards or lowering the setting - usually both). The only time I'll deploy full and righteous lumens with an approaching car is if they fail to dip their full beam, just as I would while driving. They usually get the message, and when they do I'll dip mine so we can both see where we're going.