Undertaking / filtering on left?

In slow-moving traffic, filtering/overtaking on the right, do you get cars veering right to block you?

Happened again on the way home.

I've had this on many occasions, people intentionally turning towards on coming traffic to block your passage. That said I've also had two people try and undertake me on a junction, It's not just cyclists it would seem. One had the cheek to beep me as well :/.