I will say emphatically that parents of teens are the most influential people in their lives, whether acknowledged or no. It is likely the case that parents will forever be the most influential people in someone's life and the positions you take, the behaviors you engage in, and what you teach will stick with them for their whole lives. Take a stance and teach them. They may rebel, they may not, but years down the road your opinion will likely inform their reflections and help guide their future actions.
getting off soapbox