There have been some pretty big acts of protest in the past. The self immolation of Thích Quảng Đức as protest against the treatment of Buddhists by the authoritarian administration governing South Vietnam; the lone protester who tried to stop four advancing tanks in the Tiananmen Square protests of 1989; Brian Haw's protest in Parliament Square since June 2001.
However, these efforts have all been eclipsed by workers from a Burberry factory in South Wales who, unhappy about the closure of their factory, descended on Burberry's central London store and "bought a Burberry T-shirt and then cut it into pieces."
Sit up and listen Burberry fat cats. There are more T shirts where that one came from.