Why is Legend being sarcastic about his personhood?
He's quoting David's/Eidolon's own words back at him, with extra snark.
He could have easily exposed the corruption going on and got rid of most of the red tape, then worked with the genuine heroes to get the job done. Instead he is dropping hints at the corruption and killing everyone himself.
Yeah, nah. If Cauldron were out of the picture (or
at the very least, Contessa and Doctor Mother were removed from the picture or completely de-fanged, minimum) there might be some possibility of the high road working, but without that, there's
zero chance at all of simply revealing the corruption and things proceeding positively from there.
Let's not forget that the PRT has dangerously hateful dickheads such as Tagg in positions of considerable power, and has no idea that Coil/Calvert had comprehensively compromised the ENE division and the rest of the organisation to a slightly lesser extent.
Appealing to the authorities in the Wormverse is never going to end other than poorly, because the entire world is deliberately constructed that way.
See also
Rathmun's incisive observation above about how poorly such an attempt would turn out.
The number of comments stating people are shocked about the numbers and names of people that Al has killed during his tenure here in the Worm-verse quite frankly boggles me. The closest to an innocent in that list was Othala, whilst a great many of them were unarguably irredeemable monsters that needed killing and provably wouldn't be getting it from any of the authorities within the areas those monsters were occupying.
Once again, that inescapable fact falls at the feet of Wildbow and his determination to make his world ever worse no matter who tried to improve it, or how carefully they did.
And I find it even more bizarre that almost nobody is mentioning how much all of those killings have cost Al, both the acts of killing, and just the corrosive knowledge of exactly why those monsters needed to be slain. As others have stated above, Al can take things far more slowly and (generally) cautiously in the DC universe because the League exists and for all their flaws and failings, both work very hard to limit the damage from and fight the plans of the assorted evils in their world.
Right here, at this moment, there is no-one other than Al within the Worm universe that knows how bad things are or can take the actions he has to start cauterising some of this world's suppurating wounds.
He's almost completely alone, in an extremely toxic world/society and at best the lawful authorities are deliberately hamstrung, and at worst are actively working hard at making everything worse.
Why was Piggot so thankful Shadow Stalker wasn't part of the meeting? Is it because Sophia doesn't have anything constructive to say and would belittle other meeting participants?
Is it because Sophia is so psychotically aggressive that she'd seriously consider attacking Apollyon?
Probably both of those, plus the fact that she's fundamentally a hateful little shit with a massively inflated sense of her own competence and importance. Sophia's presence in any even vaguely tense or complex situation is only ever going to have a highly negative impact on what the rest of the group are trying to achieve.
Where'd they get the video from?
Most likely one of any number of university astronomy programs/observatories, or even any number of 'amateur' astronomers that happened to be looking in the right place at the right time. The vast majority of which would be only too happy to allow the footage to be spread widely for minimal if any compensation.
Uh-oh! Belated realization!