As with anything else, it's only useful if you know how to use it well enough. For me, a pen isn't all that useful, but a kubotan would be. A knife would be better, but I can't carry them often enough (as with the kubotan). A cane is better than a kubotan, less so than a knife, and I can literally take it anywhere I want. I'd be better served by a sword, but that's not legal anywhere I know of.Pens and flashlights are allowed, but how helpful are they? Some people advocate kubotans and others say they suck. Pretty confusing.
If STBs arent really good then this sucks. But I'm not switching to sneakers. I like boots in general and I cant really run fast anyway lol.
What kind of kicks would you recommend against an attacker?