Well, let's see...JW's claim that everything they teach is based on the bible but here are some rules that have no biblical support to back them up:
Extracurricular school activities
Joining any organization other than theirs
Bringing a recording device or taking notes during your judicial committee
Education beyond high school unless it’s for the WT’s purposes
Getting a piercing anywhere other than the earlobes
Tattoos
Accepting a blood transfusion
Giving blood
Eating foods with ‘by-products’ in the ingredients, esp. hot dogs
Celebrating any holiday or birthday, including Thanksgiving and Mother’s/Father’s Day
Yoga
Masturbation
Certain sexual acts even with your spouse
Mentioning a disfellowshipped person in a prayer – even in private
Playing music of any kind, other than kingkom melodies, for a wedding in a kingdom hall
Having your palm read
Serving in military service of any kind
Having a job at the UN
Reciting the pledge of allegiance
Singing the National Anthem
Children must abstain from anything involving any holiday at school or elsewhere
Voting
Running for class President
Attending your high school Prom or other dance/social function
Carrying a firearm, even as a policeman or security guard
Dating or marrying a non-Witness
Dating before the age of 18
Breaking off an engagement
Divorcing your spouse if they’ve committed adultery but you’ve had sex with them after they’ve confessed
Attending another church
Hang gliding
Sky diving
Bungee jumping
Paint ball
Smoking or chewing tobacco
Owning a cross, whether as decoration or as a piece of jewellery
Maintaining friendships with non-JWs
Studying the Bible or Watchtower literature in small groups in someone’s home
Wearing trousers to bethel, a meeting or an assembly if you’re a woman
Wearing short skirts at any time
Wearing ankle length skirts to JW functions
Wearing a skirt made of denim to JW functions (including a bethel visit)
Wearing running shoes or sneakers to JW functions (including a bethel visit)
Growing a beard if you’re a man
Sideburns for men must be kept short
Wearing anything other than a white shirt if you’re a man giving a talk
Men giving talks must wear suits – no sport jackets
Women giving talks can only be in twos and speak to one another, never from a lectern
The length of men’s hair must not grow past the top of their shirt collar
Reading anything deemed to be ‘apostate’
Owning a Ouija board
Dying your hair if you’re a man
Wearing makeup of any kind if you’re a man, unless you’re ‘acting’ in a drama
Attending a congregation other than the one assigned to you based on where you live
Stringing lights on your residence for decoration
Costume parties – even if only JW’s are present
Hiring a magician to perform at a wedding, or other social function
Saying hello to a disfellowshipped person
Questioning doctrine Not turning in a spouse, family member or friend to the elders if any of the above is violated
Seems kinda 'culty' to me...and this list could go on and on. Every aspect of personal choice and behavior is regulated in some fashion and infringing on these rules automatically makes you suspect and 'questionable association'.