IM cannot be stopped. When a government broadcasts they will censor them, the very next step is for protesters to install something like Bitchat, which does Bluetooth-based, mesh/P2P IM-ing, and is specifically designed to resist even full-on Internet shutdowns.
The best way for governments to deal with protests is to have policies in place that fulfill what We The People want. Everything else is a band-aid atop an ulcer: it hides the problem for a little while, but the problem itself keeps growing regardless.
The best way for governments to deal with protests is to have policies in place that fulfill what We The People want. Everything else is a band-aid atop an ulcer: it hides the problem for a little while, but the problem itself keeps growing regardless.