Supporters of Facebook shuttle drivers showed up at...[company] headquarters in Menlo Park...demanding better pay, better work conditions, benefits and the right to unionize. The tech company's drivers weren't there themselves since they were working...[An] online petition demand[s] Facebook respect the rights of its bus drivers to organize a union...One of the biggest complaints was working split shifts. They claim drivers often wait six hours in between picking up and dropping off Facebook employees without being paid. "They should be able to make a decent wage, get paid for the time they spend working and have adequate health care and working conditions...," said Rome Aloise of Teamsters Local 853...Facebook contracts with Loop Transportation for its buses. Facebook declined to comment, but the CEO of Loop Transportation Jeff Leonoudakis sent me a statement saying they pay an hourly wage that is among the highest in the industry with full medical benefits, vacation, holiday and sick days...If the teamsters are successful in unionizing the Facebook drivers, it could lead to other tech companies following suit...The teamsters say the union vote will take place Wednesday.