What does the purple awareness ribbon stand for?

Answer:
The purple awareness ribbon stands for several illnesses and causes, including the following list:

ADD
ADHD
Alzheimer's Disease
Animal Abuse
Anti-Gay Bullying (spirit day)
Arnold Chiari Malformation
Cancer Survivor (all kinds)
Childhood Hemiplegia and Stroke
Children Left Unattended in Cars
Crohn's Disease and Colitis
Cystic Fibrosis
Domestic Violence
Epilepsy
Fibromyalgia
Hurler Syndrome
Leimyosarcoma
Lupus
Macular Degeneration
March of Dimes
Mucolipidoses Thyroid Cancer
Mucopolysaccharidosis
Pagan Pride
Pancreatic Cancer
Pancreatitisis Chronic
Religious Tolerance
Sarcoidosis
Sjogren's Syndrome
The Homeless
The Victims of 9/11 (includes police and firefighters)
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