I don't quite know whom to ask regarding this situation. I was in charge of a large gathering/celebration in my community. As the attendees of the celebration were a mixed group, some kept kosher, some not, some Orthodox, some conservative, some reform, and others who were not Jewish. The event was held at a local community center and we had it catered by the best kosher caterer in the county. (who prepared the food in their place, we did not use the kitchen at the community center at all.) I personally drove over a half hour each way to pick up the huge cake from the best kosher bakery around. In case there were any questions I made sure to photograph the kosher certificates at the bakery as well as the caterers establishment. I even had the assistance/advice of the local Rabbi to ensure every base was covered.
The event was last night (began after shabbos) Most every one raved about everything, the location, the food, the decor, etc. Everyone except one man, who complained rather loudly that there was nothing he could eat, as it "was not kosher enough" The Rabbi who advised me quickly went to the gentleman, and told him everything was ok, and kosher, and got from me copies of all of the certifications to show the gentleman. The man took one look at the certifications and said that since the certificate was signed by a Rabbi who was from a conservative yeshiva, it was not "kosher enough" Mind you, there were many other attendees who are Orthodox, including one Rabbi, who all ate and said everything was wonderful and approved it all as kosher and fine. (I had asked the Orthodox Rabbi about the certificates and for both the caterer and bakery, and HE said they were "fine, good" before I hired them for the event.)
I really thought I had my bases covered, and wanted to make sure as the host, that since the event would have a mixture of attendees, I would not be offending anyone, and would be providing not only a wonderful evening/celebration, but cater to all the various food requirements. (some attendees had food allergies as well as dietary requirements, and some were vegetarian as well as kosher)
So, did I commit a faux pas, or is it as one close friend who was helping me with the event say, "some people just want to complain, and will create a reason to complain just to get attention"?