Just looking at a couple of articles here:
Travel Advice for India - Australian Department of Foreign Affairs and Trade
Players warned: India is your risk - Cricket - Fox Sports
England players urged to miss IPL - report | Cricket News | Indian Premier League 2010 | Cricinfo.com
I would certainly take the Australian Government's travel warning with some credibility, but if I were an international cricketer I would tour, you can't let a group like Shiv Sena tell you want you should do or not do in life. So is it as bad as the media states it is, or it just a beat up?
BTW if any has any intentions to come in and troll, stay out of this thread. Serious discussion only.