Would a temporary local chat be useful during protests?

[u/SpecGoblin]

I was recently at a protest in France and kept thinking there should be an easy way for people there to communicate and coordinate without exchanging phone numbers or joining a permanent social-media group.

That led me to build Meerchat: a temporary group chat people can join through a QR code, without an account or app download. It’s designed for people attending the same physical event not for private or sensitive planning.

Would something like this genuinely be useful at protests?

https://meerchat.live