Charlie Sheen and Denise Richards Fighting Again

This time the ex's are fighting over vaccinations. Sheen feels they are dangerous, Richards believes they are fine. Sheen's lawyer has sent a letter to to the children's pediatrician threatening legal action if the doc continues to treat his kids (TMZ). The safety of vaccinations has become controversial over the years with two of it's most vocal oponents being Hollywood couple Jim Carrey and Jenny McCarthy. It is believed that vaccinations are to blame for the rise in autism.