I started this survey and then decided I couldn't continue.

There is no such thing as a 'criminal act' until someone calls the police, the police investigate, there is an arrest and someone is convicted - all else is innocence in the eyes of the law.

Criminality is not discovered by opinion, but by legal processes. If I'm doing something illegal why aren't the police banging on my door?

The moment someone is convicted then I will accept that a criminal act has taken place - as far as I know no one has been convicted of a criminal act using bitcoin (ie Bitcoin is not being used for criminal transactions beyond hearsay).

Clearly everyone using bitcoin is behaving in a totally legal way (since no one has been found guilty of anything criminal).  

If you (or anyone else) believe people are breaking the law then you need to call the police.