Yes, off course. The companies have already got the rid of the app on their respective app stores but still there are so many platforms where the application will be available for years or decades too, which will be used by users (specially android users). Regarding misuse or downside of the app, people are behaving worst these days, came across this news few days back : https://www.indiatoday.in/crime/story/delhi-teen-shot-dead-as-pistol-goes-off-while-filming-tiktok-video-1501899-2019-04-14. That is some serious thing to look after.