It's highly illegal anyway. Logic would tell you not to do that.
Don't forget, Poland doesn't have a huge number of motorways, so the concepts of motorway driving are not always obvious. I recall a case a few years ago in the Midlands, where an Irish ambulance driver was prosecuted for reversing up the hard shoulder. His excuse, when police stopped him was, "Sorry, I'm Irish!" He'd never been out of Ireland before but was a very experienced driver.
The situation isn't actually that uncommon. In Germany drivers who do this are known as "Ghost-drivers" and there are special proceedures for other drivers and the police for dealing with someone who finds themselves on the wrong side of the autobahn.
I believe in this situaion the Polish driver may have been confused by roadworks. Not surprised, they can be bloody confusing.
It is so sad.
I heard somebody say that the UK should be held to account as it condones driving on the left-hand side of the road rather than on the right. It was a Pole who told me this.
Tell the Pole he should come over to Poland and drive up the Warsaw-Gdansk road and see all the big, expensive Polish registered cars which seem to condone driving on the left as well, overtaking several cars at once on double white lines (above the speed limit) and expecting YOU to drive in the gutter to accomodate their stupidity.