It can be pretty cool, if the symbols are used in a way of cultural appreciation. However, if they are misused or slandered, I'd rather they not be used at all. Sadly, the most common "Slavic" symbol in the USA is the Hammer&Sickle. Faux Cyrillic writing comes next, and it is mostly found on Soviet-chic stuff worn by leftie-hippies. I hate those kinds of people.

I knew some 'Russians' who wore hammer and sickle in Highschool but they were neither ethnic Russia, Slavic, nor European.  As to the Faux Cyrillic, that's usually the same as this Che-Hippie stuff.  Even though, both Stalin and Che would have loved to put those Hippies to work on a hydroelectric dam somewhere in the bush.