A new study says social media "disproportionately impacts the viewing behaviors of younger consumers," according to Horowitz Associates.The study says 24% of 18- to-34-year-old adults and 30% of 15- to-17-year-olds have started watching a show on TV because of something they saw online or through social media. All this compares to a 16% for all adult viewers 18 years and older.What about tune in? Some 14% of social media users say it helps remind them to tune into shows. This trend is the highest among 15-to-17-year-olds where the number is 28%. It is 19% among 18- to-34-year-olds.Deeper engagement comes to a narrower group of social media users -- just 11% of consumers say they interact on social media, or other sites or apps, when it comes to content they are watching on TV. Ten percent like posting to social media sites or other Web sites about shows they watch.Sounds like everyone should jump in. But they need to do it carefully.Adriana Waterston, vice presient of marketing and business development for Horowitz Associates, says that in the social media environment, "consumers do not want to feel 'marketed to' or manipulated. A successful social media or interactive strategy must feel genuine, not fabricated."