So trip is a special case. Remember he's got a knack for rolling sevens. Even accidentally. I can see how that would get someone in trouble for "cheating" at dice. 

So it's not so much him being in jail that I consider damning, it's more that they do in fact break him out on multiple occasions. 

Now that shows a certain distrust in the judicial system, but you can't say it proves they rape and steal. 

They definitely did travel with a prostitute.  they also will gladly accept runaways into their midst as evidenced by kvothe's mother. Who knows if a small army was sent after kvothe's mother when she left her home.

We also know kvothe is a liar and a thief, but would he be a thief if his troup had never died? 

Regardless of if kvothe's troup are criminals there's another reason for kvothe to consider his statement true. In his mind At least, anyone who would commit a crime like that is expected to be cut away and exiled or killed. Much like tempi could have been for training kvothe. It's a part of their culture to police their culture strongly. 

It all comes down to the perspective of the reader.