Taser (TM) in Poland?
Are you talking about the needle-shooting device as referred to here, or about the lesser widely-available "contact" prods?
In any case, you're right, it's mostly a matter of education. And in the US as well as in numerous other countries, marketting and FAUXNews (or the local equivalents) play a big role in educatiion. A pink glittering gadget marketed as benign is going to be used in a wide and disproportionate manner. I mean, Taser marketing campaign unambiguously push their product as an equivalent to the good old "groin, meet knee" technique. Though rather unpleasant, a knee to the 'nads never caused any death to date (AFAIK), and it's been widely used for the past few millenia. The Taser(TM) gun has been around for, what, 10 years tops? And see with what results. Now that it's cute and fashionable, it's bound to get worst.
Modified 12 gauge guns firing rubber bukshot are also legal -and rather less likely to cause death or permanent injury than a Taser-, yet they don't sell them in Barbie(TM) version.