1) I believe they are clean until they are proven to not be clean. That being said, when they are proven to not be clean, i am generally not surprised.
2) "Organized" may be going too far. I could go with any of "facilitated", "accommodated", or "ignored". As for which teams, same answer as for which riders.
3) Not any more. I may have laughed the first five or six consecutive years they said it, but any joke eventually gets old.