Consciously I know that it isn't much of an actual risk but wearing a knife around my neck feels like the first act in a play where the final scene is me laying there dead, having accidentally 'fallen on my sword'.

I feel the same way about wearing a necktie. It's like the opening act in a drama that ends in a hanging.

There are ways around that. If anyone wants to know give me a nudge and I'll start a thread.