There are a lot of customs that JWs cant do without any clear scriptural backing (off course there is always some infered scriptural principle to back up what they say)
When I was a teenager my study conductor disciplined me for burning incense, reading me some Mosaic laws that obviously do not apply to Christians. Though this was a personal opinion not a Watchtower ruling.
Some that i can think of are;
- No beards
- Having to wear a suit when doing the microphones in summer (this seems to vary amongst congregations)
- Wearing a tie Witnessing
- Being disfellowshipped for talking to disfellowshipped people (the inferred scripture is "loose conduct" of all things)
- No smoking
- No gambling
- Being disfellowshipped for taking blood
- No large gatherings (what a joke, even Jesus attended a large wedding with copious amounts of alcohol that he himself provided)
What are some others, and if you can quote from some Watchtowers that would be even better.