It is very common for protesters to express their dissent against a certain country's action by protesting in front of its embassy. For example:
Hundreds of British-based Ukrainians gathered outside the Russian Embassy in London today to protest against the build-up of troops in the Crimea region.
The demonstrators chanted and held banners demanding "Hands off Ukraine".
Many of them waved placards accusing president Vladimir Putin of being the "Russian aggressor" and they sang: "Putin is a murderer" and "stop the occupation".
But did those kind of protests ever achieve their goal? And if not, why do people even bother holding them in the first place?