If you dare, one might also ask the question how old this custom actually is and if it was culturally relevant in ancient times. Since Celtic graves in Hallein and at the Dürrnberg, (which is regionally close to the current centre of this custom) often incorporate finds of an iron knife, pig or oxen stilts, and plates and bymeal, it is to be postulated that this might have been the case.
In any way, I strongly suspect, the German "Jagdnicker" knife upholds a tradition that is strongly rooted in a cultural context. Even in the current offensive weapon law madness that is going on everywhere, the German "Jagdnicker" had its protectors amongst politicians, even amongst those that are strangers to the subject.
I want to postulate that this type of knife is a strong bearer of tradition and culture in Germany. Dismissing or banning it would strongly compliment the local cultural aspects of everyday life. Upholding the "Brotzeit" tradition with all its aspects is a way to promote sensible consumation of food. This would help to promote consciousness towards eating in itself, which could counterweight the trend towards fastfood, ecologically questionable production methods and even cut down on CO2 output, even if I strongly suspect this to be doubtful.;-)
As you might have noticed, I use a somewhat juristically coloured language, and I do it on purpose. For I have the suspicion that the protection of this style of knife might as well be a matter for a UNESCO cultural commssion.:-)
Just thinking...might this apply to other knives (Puuko, Leuku, the Sheffield Bowie knife, the Khukuri) as well?*g