I didn't take it as a flame. Here are my thoughts. If I had a small (< 3") custom pocket knife with a drop point blade, it is a tool, or even jewelry. If it didn't get picked up by a metal detector it wouldn't matter as there are other things I carry that don't get picked up, such as handkerchief, wallet, etc. On the off chance that security personel saw the knife and became upset, I would calmly explain that and politely ask to see a supervisor if they didn't understand. If they were allowed to prohibit my carrying it, then so be it. I have a right to prohibit what people bring into my home, I understand that some prohibitions might apply to me in other places. I just see an expensive, small gentlemen's pocket knife as jewelry, in other words, a non issue.
Danny