There have been ton of research on this subject and for sure, the online cyber has affected hugely people social interaction skills and behavior, especially in youths and children. Suicide on cyber crime has risen fast and aggressive, toxic bullying is something that is out of control. Plus there are the predator's who hunt out innocent young girls to obtain their own sexual fantasies. There are many terrible things and the youths and kids are not equip to deal with such things.. I feel it is the duty of parents to teach them. Not through feer, but through understanding and to show the kids what to do when things go bad.
The other side is much more positive. There is endless information we can look up and ton of videos show us how to fix furniture, cars and so on. Plus Youtube the most scary pranks and so much more. Online is like a knife with two edge. It can be fun and interesting or deadly, but society is nothing like it was 10 or 15 year ago. Even people in the streets are changed and a lot is to do with online, especially with school age kids because they are not shown interaction skills through physical play and forget manners and so much more. I feel parents don't even have the skills in some cases to properly educate their kids when things go wrong, or kids simply are too scared to say anything. Yes, it has a huge impact on mental health, especially through cyber crimes and bullying