Before the bullet tore through his left leg, Hadad Gamry knew that he was venturing too close to the razor-wire fence between the Gaza Strip and Israel. But the 20-year-old wanted the world to know how angry he was, so Gamry says he taunted the soldiers on the other side anyway. That decision resulted in him becoming ... one of the more than 13,000 Palestinians protesters injured near the barrier. At least 142 demonstrators have also been killed by Israeli troops. Israel maintains that Hamas, the Islamist group ... that many countries consider a terrorist organization, has encouraged civilians to put themselves in harm's way. Gamry and others NBC News spoke to in Gaza rejected the idea that Hamas had compelled them to go to the fence, saying they went because they had run out of ways to make the world pay attention to their suffering. The pervasive threat of violence backs up the land, sea and air blockade imposed in 2007. Hamas won elections the previous year. Economically, the blockade is making life intolerable for many of Gaza's 2 million residents. Almost none of the water is clean, raw sewage is pumped straight into the sea and worsening power shortages mean Gazans have electricity for only around four hours a day on average. Unemployment rates are close to 50 percent - more than 65 percent among those under 30. Israel and much of the world officially refuses to deal with Hamas and long-term talks aimed at creating an independent Palestinian state ... have stalled.