You may just be lucky. In a lot of districts - entire states, even - harrassment of homeschooled children is school system policy because the amount of money each local school district gets is directly based on the number of enrolled students. One less kid at a public school desk = many thousands less in funding for the district. So they try to "encourage" as many parents as possible to give in and send their kids to public schools.
It's all about the Benjamins.
Many many homeschool parents are quality people who are interested in their kids welfare and are capable of teaching them. But many aren't too.