One example is with the children.
In the old days, children used to play outside with their friends.
Now majority of them are just staring at their iPads.
Yes too much using gadgets are dangerous of our health because of the raditiation from the device,
also since you preferr just sit and browsing the site or playing games you will gain weight and possible to be obesity,
make it balance , use gadgets then have exersice four times a week.