I have a question... who gives a fuck if the band sucks live? You are putting your name and your production's reputation on the line every time you decide to work with a client. What they sound like live, how well they perform, if they even can perform, bla bla bla is NOT up to the engineer working with them, that's completely on the band. I don't worry about any bullshit like that when I work with a band, I worry about making sure it comes out as good as I can make it - period. If you make a band sound badass through however you achieve it, punching in, editing, etc. nobody is going to come and talk shit to YOU because the band can't play what they recorded at a live show, they are going to say "that band sucks live"... so what is the big fucking deal? But hey, I guess if people want to be way too concerned with something that they should have no concern about, then whatever.