Your walking along and another person approaches with a dog and comes closer and closer and then lets the leash go slack (or the dog pulls the owner towards you) to meet your dog because they just want to say "Hi".
If you are guilty of doing this to other people please stop and ask first. The majority of dogs do not like this and this can be devastating for someone who is trying to rehab a leash or dog aggressive dog. It literally can set them back months of training, one experience of a strange dog coming into their safe zone.
Its the same as touching a pregnant persons belly without asking or standing too close to someone in a line so they can feel your breath .... we have all had experiences where someone gets too close and makes us uncomfortable, how close before you get uncomfortable is an individual feeling and some of us need a lot of space and others need very little... its the same for our dogs.
Its flat out rude and you can create problems where they don't exist and seriously hinder and reverse someones hard work to make their dog comfortable and neutral around other dogs.
Same for off leash, if your dog does not come when you call them, EVERY TIME. Then you should not have your dog off leash on public property.
You have a friendly dog that's great.... You still need to ask before you approach a strange dog.
Your a friendly dog lover that's great... You still need to ask before you approach a strange dog.
And if someone says "NO" to your request don't push it, don't be rude and forceful... Just because "dogs love you" doesn't mean that you can put someones dog ask risk by invading their personal space, undoing training and potentially getting bit and putting the biting dog at risk because you think somehow you or your dog is different.