I've had quite a lot of scratches, bites and ripped shorts from dogs over the years, often from dogs that "won't bite", but I'm still generally pretty tolerant. I don't have a dog so not really aware of the dog rules. I did once have someone stop me on a run in KP to ask if dogs were allowed but I couldn't help him, just told him I see plenty.
The last time
Molly followed me I did start encouraging her to keep following me once we got out of sight of the owner because I thought she deserved a bit of worry but I lost her after about 800m when we went past some other dogs.
I kind of expected the owner to be a bit angry with me when I saw her again a bit later but she just grabbed Molly very quickly (still not on the lead) and held her off the side of the track as I ran past. I was in the middle of a hard effort so didn't want to stop that time.