Saying what we think loud and clear in a public and sustained way is not easy. We need to be really certain about our message, able to get it across quickly and simply enough but also in a way that is sufficiently powerful that people take notice. We also need to pick the location and time to get the most out of the message. To reach the intended audience. To trigger the response we want. It's certainly an exercise in communication techniques that's for sure.
Some people might ask why do you bother? Don't people know what you think already? Why do you need to broadcast it all over the place?
We know from research that having a say is important. Being able to be heard and feeling that we can influence others are key aspects of feeling part of a community. In some ways it doesn't really matter what our message is, rather being able to share it with others and feel like they are listening is what can be as important as the message itself.
It might not always take a billboard or large wall painting to get our message across, to have our say. We can do it more simply but it can certainly be a talking point to have a large visual image in a public place. It can be admired for its visual impact as much as for its message. Agree or disagree with the message, it's getting noticed.
Not having a say or being heard can trigger a whole range of negative responses, particularly if we don't have a mainstream or socially acceptable way of sharing our ideas. We all want to feel heard, feel like others care about what we think and have to say. It helps us feel connected to each other, as if we matter to others.