My thoughts exactly. I saw the mention of the flag and was confused as hell, because I thought reactionaries in Poland hated the USSR, but I guess they're trying to appeal to Putin or something, and think that he's trying to remake the USSR, but capitalist or something? I really don't know. Maybe they just flew it to confuse people, and it's working on me really well.
At least based on the picture, the flag appears to be flown flipped from the end that isn't normally on the flag-pole side. So like seems like a point of using it as an insult, since everyone still likes to act like Russia is still the USSR. So I am guessing it is just reactionaries being reactionaries and not using the Russian Federation flag since it is less "scary" or something compared to the USSR (from the perspective of anti-Soviet right-wingers).
Though at the same time, you could argue that it is flipped because they just didn't know how to fly it properly. Though I think you're right, this is probably intended as some kind of anti-communist thing.
They had to go out of their way to fly it wrong. You can see the white strip that the metal hoops are set in on the end of it. So it would be kind of funny if they did manage to unintentionally mess up so bad.