Walkers on course

Going to start by saying I have nothing against walkers and am not trying to say I am any better than anybody. I just started running races this past year and am noticing a pet peeve of mine are groups of walkers who take up most of the lane leaving a sliver for runners to pass by, especially more so at the beginning of the course. I understand it may be some people's first time walking a race but I just can't seem to shake the feeling that common sense would tell you to move over to the edge a tiny bit more. Anyone else experience this? Did you adjust to start up to a certain point in the line?

I just got back into running and pace slow, so I feel like I shouldn't start further up. But maybe I should try that next time?