The Mentos commercial that the Church of Scientology doesn't want you to see.
To learn more about why some Scientology protesters wear masks to conceal their identities, read about Scientology's policies for attacking critics, like in their criminal plan "Operation Freakout":
Wikipedia cite:
{{cite news | first = Chicago Protests | last = Scientology | title = Mentos Commercial (Scientology) | url = https://www.youtube.com/watch?v=S9Se6EPjyyc | work = YouTube | date = August 14, 2011 | accessdate = January 14, 2017 }}
Mentos Commercial (Scientology) August 14, 2011,
Mentos Commercial (Scientology) August 14, 2011,