In a tradition of great British adventurer's I'd say, and certainly no more irresponsible than
this admirable and self-effacing attempt to cross the Atlantic in an overloaded microlight, covered in unapproved modifications, flown by a pilot without an instrument or night rating and no rescue support, in breach of at-least two countries ANOs.
Don't we need people to push the envelope a bit - it's surely unsporting to suggest that people setting out on record breaking expeditions should follow inconvenient rules about not overloading their aircraft, carrying sufficient fuel for trip+reserves, proper rescue cover and so-on. Lets face it, that sort of stuff only applies to ninnies like the rest of us who are forced to comply with totally unnecessary safety regulations to satisfy nanny-state regulators.
Presumably this is the view of the various national regulators who have never prosecuted such individuals, which I assume is completely unrelated to any fear of being hammered in the popular press by such individuals self-publicity machines.
Or something like that.
P