That said, Jesus Christ people. Take out your headphones, put your phone away, and freaking pay attention to your surroundings. People wander around like they're the baby from the Popeye cartoons expecting everything else to miraculously flow around them.
Forget about bikes and scooters, it's rude to other pedestrians who may be walking faster, running, or actually paying attention to what they're doing if you're meandering back and forth across the sidewalk and can't even hear someone say "Excuse me". The sidewalk is for walking, yes, but that doesn't mean it's for the exclusive use of any one individual.