I have known it happen when filtering on either side, I have seen cars deliberately drive on to the marked cycle lane when they see me coming to stop me filtering down to the front. I just switch side and filter down the other side, on occasions I have been known to get of my bike walk passed the obstructing driver then plonk the bike down in front of them and cycle on. You can almost hear their teeth grinding, as there is nothing they can do about it.
Of course filtering, particularly down the left side, can be dangerous and must be done with caution, especially where large vehicles are involved.