They are quite aware of the ban right from the on set but choose to use sanction, one thing you should understand is that they have the power to place the ban but wouldn't considering those that will be affected alongside. Also remember that Russia is not just an ordinary country you could do and undo upon when it comes to war and millitary power, they are fierce in this regards, even US and China dare not trespass them in this regards, they don't just have weapons they build it themselves.

I think the impact of NATO could go along in such situation while to cap it all, if China could join in this fight against Russia then things may come to normalcy but will cost lots of life.