Technology is not always a good thing.
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.
I think one of the negative effects of technology is time consuming. Instead of doing work or studying, we often open our social media accounts or games which consumes a lot of time, causing us to procrastinate on studying or working. Also, technologies nowadays helps us with some work causing us to get lazy.