[X] Trust no one – Verify everything you've been told before making a decision. You don't trust either party in this situation, but you can't completely rule out that Tattletale is telling the truth. And it wouldn't hurt to have Perfect Storm do some digging of its own for verification, so you'll take a rain check for now.
-[X]But make it clear that she's the one asking you for help, so it's best for her to watch what she says and who's secrets she's throwing around. You're well within your rightsto take her down to the PRT right now since she's prying into your secret identity and she's a Villain, so it's best for her to keep that in mind.
-[X] Begin by telling her that if we were really as crazy as she says we are, she would probably be dead right now. Possibly ask her if the cops and robbers thing is how the world works, or just how she wants it to work. We are already moving carefully to minimize the probability and potential impact of our actions beginning a gang war, but leaving things as they are is an even worse option no matter what she tries to tell herself.
Neither Lisa nor Coil are trustworthy for this Taylor. Lisa's right about Coil, even if she didn't bring any evidence. He will hold stuff over us, digging us deeper and deeper into his debt, while a the same time using blackmail to keep us there. Heck, we'll probably already be considered at least allies with Coil, if not subordinates just due to getting the laser rifles from him. After all, what defines Coil's men in the underworld? Mostly those rifles and incredible coordination. She IS trying to ferret out who we are, right alongside her telling us about being gangpressed, Honestly the killer stuff would have come up eventually with the PRT's inability to hold villains. Until then though, we're probably going to try and stay non-lethal from what I've read. Lisa just honestly took this the completely wrong argument. We're not quite the idealistic hero that Skitter was who needed to justify her villainous actions. All she's doing is burning any good will we might have from her telling us her sob story of being pressed into villainy by Coil.