As Wad has already said it is a bit of a 'grey' area as so much of what gets posted on here is just subjective individual experiences. Many people scream 'scammer' when their order doesn't arrive but as we all know there are heaps of reasons that may have happened. Vendors can be just as guilty of doing this too when a buyer is having issues, they get branded a scammer and that's the end of it, neither approach is really the way to go about things. When I have had an issue I tend to put some feelers out, PM some other members whose opinions I trust, post in a thread or too asking people to PM if they were having similar issues etc. This normally helps me form a more informed opinion, in previous situations I have received multiple PM's for others saying they were having the exact same issue, and in some cases lots of people saying they had been receiving their orders just fine. Doing it this way keeps unsubstantiated allegations off the forums, doesn't cause unnecessary drama and positions you well should you need to raise it with the vendor because in my experience if you are polite and non emotive in your dealings with vendors they extend you the same courtesy. If on the other hand you run your mouth off screaming scammer all over the forums and sending the vendor abusive and demanding PM's expect to get fuck all apart from blacklisted. So yes lots of 'grey' but when you have a pretty good idea you are not alone having an issue I think it is entirely appropriate and for the good of the community to mention the vendors name, provided you have gone about things as described about first and done your research.