Wrong, they take a Paladin hostage, if you free him, the BoS counterattacks, but the attacking force completely destroyed.
Trust me, I loathe the way they were represented in Fallout 3. I like Talon Company because of what they are, not how Bethesda's "Good versus EVULL" writing portrayed them. I DO NOT want a return of that, i want them portrayed accurately, as the True Neutral faction they really are.
As for the first point that's not what happened in my game, so I'm guessing it just comes down to chance rather than being scripte.
As for referring to them as True Neutral; they've only ever appeared in FO3, thus their actions in game are all we can use to define them, not what you want or think a 'proper' mercenary group should act like.
However I never thought of them as 'evil' in game, they simply take the highest bidding contracts (such as from Mr. Burke), the 'EVULL' image they hold is due to two things:
A ) They attack a Good aligned player.
B ) Their banner has a freakin' baby being carried off by a skull headed bird of prey.
Neither of those things are 'EVULL' The first is simply business whilst the second is a shock tactic.
Plus gamers generally refer to those attacking them as 'bad guys' regardless of their morality.