Re: Click baity headline is click bait
The majority of Reg readers, and other star gazers (armchair or otherwise) know that 'Alien Megastructure' is shorthand for 'Hmm, we've observed something weird that we can't yet explain'. The use of the phrase isn't to deceive, but to make you feel a part of the gang you in the joke.
Were a flying saucer the size of Australia suddenly appear in Earth orbit, I'd likely hear about it on the radio ("We interrupt this broadcast with a special bulletin..." ) and would then drive straight to the pub. There I can find beer, lots of beer, some physicists and, should the UFO prove to unfriendly, a willing member of barstaff to spend my last five minutes with.