Have you been paying attention to the pattern at all of which sources are getting popped first?
Also, be aware... Fed arrests often take place a year or so after sale. They don't come storming in and arrest you that day. Feds build solid cases. That is why they have a 90% conviction rate.
This is why many of the UG labs ask NOT to be discussed openly. They don't appreciate the added attention. They would prefer to let the open source idiots get bagged first.
Oh, and carry rec drugs - move to the front of the line.