There has to be a way to step our games up and beat skypers. Honestly it is impossible to detect them and a lot of people who you think could be cheaters really aren't. I personally define it as when a townie and mafia work together against one of their best interests but I'm curious on how other people would define skype cheating. I think if you suspect a townie of helping the mafia out you can always have the vig shoot them but I'm trying to think of better ways to handle it more through the metagame and lieing than through pure abilities.
Keep in mind skype cheaters are probably not as good as mafia vetreans and it is better to focus on a way of beating them instead of speculation and unofficial ban lists that no one is going to really enforce.