I had that problem with my family too. My step-mother (who my Dad divorced recently) was a big partier. She used to try and get me to go to the bars with her, vandalize people's lawns, flash people for drinks, etc. when I was 17. I told her I wasn't into that scene and she took it totally personally. She kept insisting she could get me into the bar, but couldn't seem to grasp that I didn't want to be there because it was against the law. She definitely had a "laws are made to make people sneakier" mentality about it.

She was also really into tanning. She used to go 2 or 4 times a week. She kept trying to get me to go with her but I didn't want to go because I am not interested in skin cancer. She got so mad and said that tanning beds don't cause cancer, only the sun does. Two years later, she got skin cancer and refused to allow her friends and family to go tanning ever again. She never admitted I was right and still held a grudge against me for refusing to go along with her in the first place. I guess it would only be okay if I got cancer right along with her.