What's with the Polonium?

Polonium reminds me of Polonius, Ophelia's father in Hamlet and a famously stupid guy. Isn't it scary? That apparently everybody and their mother in Russia can get their hands on some radioactive material, poison a guy to death and blame it on the sushi?
Isn't it scary that Vladimir Putin, ex-KGB agent and ruling monster of Russia seems to deal with anybody who criticizes him by sending out people to murder his critics?
Isn't it scary that nobody can or will do anything about it?
If I was the Brits, I would be livid. Very upset, to say the least. Traces of polonium have been found in planes, and other places. in England. People are showing small to not so small traces of radioactivity. Imagine if you were one of the passengers sitting next to the poisoned guy. How can you know the poison will not affect you? How can you know you won't die of cancer brought by polonium poisoning?
The degree of roguishness and irresponsibility of the government in Russia is really worrisome.
Methinks the West should give the Russians a strong warning about not engaging in these kinds of spy novel shenanigans. If they wish to pollute themselves with polonium, they should do so at home.