Hackers are indeed a vital part of online security. There's no such thing as a 100% security online and exposing possible risks can have a positive outcome. But I don't think that blogging about it with sensitive information is the best way. Even if he wanted acknowledgement, informing the hotel and writing a "clean" article about wifi security would have benefitted him more in my opinion. Thank you for sharing. Any links to his blog article by the way?