I don't know whether the Singawhores are criminals, but they certainly are a bunch of incompetent buffoons. Generally they can best be described as an assortment of failed captains.
Their ranks have been thinned though, Ronal (Mamasan) has been sacked and Dick Stew has been forced to leave. That only leaves two, Little Dicky Lie and Mdm. Wu Wu (Ronal's prized possesion, but she turned on her Mamasan).
Time will tell.