The strategy might be slightly different in each country (location, for instance), but the motive is largely the same: to draw attention and press coverage to their perceived political grievances. 
Mkakati huu unaweza kuwa na malengo tofauti kidogo kwa kila nchi (kwa mfano kulingana na mahali nchi ilipo), lakini lazima kwa kiasi kikubwa lengo linakuwa ni moja: kuvuta hisia za watu na vyombo vya habari ili kusaidia kusikilizwa kwa matakwa yao ya kisiasa.