I would have to agree with Seamus, for the most part. As far as I am concerned, the time frame that I would wait before posting a "bad guy" thread would really depend on the a case-by-case basis.
Previous to my latest transaction that can be viewed on the BOI, I have had sellers disappear for a few days or even a week or more at a time when I was supposed to be getting a shipment and I was not overly concerned due to their good reputation or previous history with me.
However, if someone that I do not know, that I cannot find any information about, gets out of contact with me, I will become somewhat anxious. In my last incident, even though I did not know the folks I was doing business with and I could find no one that had done business with them until I came here, I still waited almost a month before I went to the BOI. And in hindsight, I believe I waited too long. The situation would likely have been resolved sooner if I had not dragged my proverbial feet.
On another note, I do think communication is very important for transactions, especially online. If I am not able to get in contact well with an individual before I send my money, I will be more liable to sit back and ask myself whether I want to do business with them. I am aware that some folks are not able to get to a computer easily or have many customers to deal with, but it seems reasonable, concerning an internet business, to expect a somewhat timely reply.
Anyhow, I know that doesen't answer the original question perfectly, but it is the best I am able to come up with. To put it simply, under no circumstance would I post on the BOI immediately, but there is a point where the line must be drawn, for better or worse. Hope this helps.
Regards,
Lauren Rost