Quote
"Access to the Internet and social media should not be blocked before or during assemblies. Since the planning and organization of an assembly is likewise covered by the right to freedom of peaceful assembly, websites and other electronic tools used to advertise and inform about an assembly shall not be restricted or blocked; any attempts to do so would usually constitute a violation of this right."
Cite
Document
OSCE (ODIHR), CoE (Venice Commission): Guidelines on Freedom of Peaceful Assembly (Third Edition), para. 70