I am a cyclist and Walker,
Just to be realistic, having a bell is no longer good enough, you ring your bell and get no response, so you shout a polite excuse me, still no response, a lot of people are wearing ear phones listening to music and they cant hear you, I always treat everyone with politeness and respect whatever I do, it's about the person not the activity they are doing,
Then you get the people who turn around see you, but won't move out of the way, when walking or cycling, or deliberately walk or park their cars in a designated cycle lane,
I hate riding on the road with the way some drivers have no respect for other road users, and only use roads to get to the nearest cycle path or canal, so if on a busy or dangerous stretch of road I ride on the pavement, but I always stop and give way to pedestrians, I know you are not supposed to, but I dont want to die,
A polite smile and thank you goes a long way, and so does a little give and take,
A selfish person will do as they please whatever the situation or activity with no regard for anyone else,
So for example, if a cyclist passes me at high speed from behind, whilst out walking, it can be startling, but I dont then have a problem with all cyclists, just the ignorant ones, this person might well later get in his or her car and not bother indicating or drive through a red light.
I was riding on the canal last week 2 lads were pushing their bikes, I stopped to see one gad a puncture, I fixed it for him, they had a long way to go and were very grateful, one small act of kindness and these lads will be likely to stop and help someone else in the future.
Treat each other with the respect and politeness that you would like to receive, be kind, and set an example to the selfish ignorant ones, one day they might take notice and become a better person for it.
Heres a short video for the cyclists
Ps this is a shared cycle path and footpath
https://youtu.be/l6MjyGUeylY