Marc Benioff, CEO of Salesforce.com, the company that acquired the Indiana-based email marketing firm ExactTarget in 2013, is calling on other tech leaders to avoid doing business in Indiana. The boycott comes in response to Indiana Governor Mike Pence who signed a "religious freedom" bill this week, allowing businesses to refuse service to gays and lesbians for religious reasons. "We firmly believe in the separation of church and state as provisioned in the First Amendment to the Constitution of the United States. The [Religious Freedom Restoration Act] clearly blurs that line and opens the door to blatant discrimination," Benioff wrote in the letter, which has been signed by a number of leading tech CEOs, including Apple Chief Tim Cook.