Just curious, did you really want an honest answer to your question or not? Anybody that warns you against going there just don't want yo big ole' black willie spoiling all the pussy for us poor needle dicked white guys, right? I mean, why did you even ask if you didn't want an answer?
The fact of the matter is that Russians, and basically any Eastern Euro's HATE black people. Hell, they hate people from the next village over, much less if you look like you're from a whole nuther continent! People from Moscow hate people from St. Petersburg, get it? Man I gotta tell you, I don't care how big and tough you may or may not be, but if you're black and go over to one of those countries, you are risking your life.
I'll go on to say that I myself am a big tough dude. Not afraid of much. But just being an American over there is risky these days. I always talk in hushed tones, am always on alert for the gangs of thugs that lurk everywhere, I keep weapons handy, etc.
And it's never just one guy who will attack you either, it is a bunch of 'em. They carry screwdrivers, box cutters, knives and shit like that and the danger is real. I've been ther many times. I've seen it.
Don't be surprised if your post telling everybody how much they just loooove blacks over there never gets written. Not because you found out that there ain't no love for you there, but because you never came back.