Chavistas: Venezuelan street toughs: Helping "revolution" or crushing dissent?****CARACAS, Venezuela - From her bed in a Caracas military hospital, the wiry, chain-smoking prisoner vowed to continue a hunger strike and risk becoming the first death in Venezuelan President Hugo Chavez's "revolution." "Comandante" Lina Ron, who considers herself a modern version of "Tania," a woman who fought alongside Cuban revolutionary Ernesto Che Guevara, says she is a willing martyr for Chavez's cause. She was arrested after leading a violent pro-Chavez counter-protest against demonstrating university students. Thousands follow her lead in Venezuela and they have increasingly quashed dissent, breaking up anti-government protests, intimidating journalists and alarming the president's critics.****