My principle is:
If some bloody snail was driving say 20km/h under the limit, & then I proceed to overtake but as I was overtaking he bloody speeds up in an attempt to stop me from overtaking & I ended up having to speed up more to over take the f**k-wit & then I get done for speeding, I will gladly take the fine provided they fine the other douche bag equally (or more) for their bloody act...
Had my fair share of these bloody road saint snails (ranges from Taxis, Hyundai Getzs) who will drive 10 to 20 under the limit when you are behind, but as soon as you start your over/under taking maneuver they bloody speed up to stop you from over/under taking them...
Just my 2c
Had some taxi who was snailing along at 50km/h on a 70km/h zone single lane road, when the road split into 2 lanes I changed to the right & speed up to 70, but when I was about side by side next to him, he bloody floors it & matches up to my speed, the lanes are coming back into 1 again soon & at that time I had enough of his BS so I floored it & got the overtake done with & as soon as I merged back & dropped my speed back down to ~75km/h I see he was back to his usual snail @ 50km/h pace again (from my rear view mirror), so there you go... he bloody only speed up temporarily in an (failed) attempt to stop me from overtaking.