well, to me ornamentation doesnt necessarily disqualify a knife from being 'tactical', but it does certainly help
its all in the eye of the beholder i guess. sure its a marketing label, but the term implies a more combat function such as self defense/offence/stealth/concealment/lethality. so if a knife has a mirror polished blade and rhinestones embedded along the handle, i dont think it would be very suitable for concealment, for example.
choosing mainstream production folders, i would say a good example of a 'tactical' blade is the Kasper folder. good grip that someone wont knock out of your hand easily and wont slip, strong lock, the sturdy blade has the right shape for slashing/stabbing and works well in a fencing, hammer or icepick grip, and it is easy to conceal (though it could be a bit slimmer, but that would compromise the grip).
knives i do
not consider suitable for 'tactical' purposes:
pretty much any slipjoint - these may be good for opening letters or carving toothpicks, but the odds are if you try to stab someone wearing heavy clothing youll do more damage to yourself than to your target.
'hunting' style knives. usually the blade is shaped for skinning/gutting, and theyre bulky, shiny and difficult to conceal. unless you want to field-dress your assailant, these are not the best choice.
many expensive customs would serve, i suppose, but its like driving a red ferrari into a battlefield as opposed to a humvee. 'tactical' should be all about function and concealment, not ornamentation and embellishment. not to say that ornamentation disqualifies a knife from being 'tactical', but it doesnt add anything to its function and is therefore pointless. this isnt the movies - when you pull out your $900 balisong your assailant isnt going to stop and say 'duuude, niiiicee knife!'.
i mean seriously, if you are being attacked by an assailant, the fit and finish, value or 'beauty' of a sebenza isnt going to save your ass any better than a $40 folder of equal dimensions. the quality, or 'smooth flawless opening action, and satisfying click' isnt going to save you either. an M21 may be 1/10th the price, but mine has never failed to flick open yet. not to mention if you are grappling with an assailant with a $500 knife, in the back of your mind many collectors would probably be thinking 'oh no, i hope i dont chip the edge on the concrete', lol. btw, the sebenza is in fact marketed as a 'tactical folder'.
to me, tactical means 'straight and to the point' (no pun intended), and is mainly marketed as a weapon as opposed to a tool. soomething geared towards concealed carry/fighting as opposed to showcase display or recreation. sure, most people use them for these reasons anyways, but for another example of this look at how many people use serious off-road SUVs as urban grocery trucks.
and seriously, as for saying 'if i use a swiss army knife to open a letter, its tactical'... well, you are not really using it in the correct context. everyone here understands exactly what context 'tactical folder' is presented in: its generally marketed as a
weapon for self defence/offense, combat, concealment.
you can take a lot of things out of context. you could say, for example, that 'martial arts' or 'jungle combat' is the technique a group of ants use to kill a junebug.. but thats just about as silly as saying that by using a fork to eat a bowl of ramen noodles it is a 'tactical' weapon.
cheers,
-gabriel