I was surprised when I met a very passionate hotel owner last year who had never ever heard of Web 2.0, let alone hotel review platforms. When I mentioned Holidaycheck.de – the Swiss-based Tripadvisor for German speaking travelers – he joked there should be a platform for hotel owners to review guest too! Guestcheck or Guestadvisor so to speak. Then he told me about a regular guest who was a real nuisance and would complain all day long. When I asked the hotel owner why he would allow him to visit every summer, I learned that this guest would always stay for three weeks. Too "good" a guest to do without. But the owner did concede that others would get annoyed by the endless complaints voiced by this particular guest.

That memory came to mind when I read about an American couple being banned for life by Royal Caribbean Cruise Lines because of their frequent and negative online reviews about their trips – Banned from Royal Caribbean for complaining too much. There are quite a few interesting comments. Here are their reviews at Cruise Critics. Via Jeremiah.