I hate these sort of things. Like everyone is just sitting there hoping, hoping for someone to strike up a conversation with them. Oh thank god someone has started a conversation with me! /sarcasm
Respect people's boundaries please. Don't force yourself on people unless they're obviously willing participants.
People put extroversion/introversion as like this binary, permanent thing that cannot be changed. In reality I think it is a spectrum that changes throughout the day and the situation. Someone might be introverted at 8am on their commute, but a wild extrovert at 9pm in the bar. Don't assume, don't try to "help" people you know nothing about.
What's being "forced"? And what boundaries aren't being respected? If someone attempts to strike up a conversation and you're not interested, you can signal that. Or just be direct and say you don't feel like talking. Sure, that can be uncomfortable, but you can't expect humanity as a whole to repress its social nature just to spare you occasional, fleeting moments of mild discomfort. (And despite the wide spectrum of social inclinations -- I'm definitely on the introverted end -- I think it's accurate to say that humans, as a species, crave social interaction.)
In your ideal world, how would someone even signal they are a "willing participant" without talking to someone?