I've done my fair share during college
It's less harmful than alcohol and cigarettes despite its legal status, but it is a terrible habit. The most dangerous thing about it is that it affects people without them knowing... you may feel like it's all just fun and harmless, but in reality it is holding you back (making you dull, lazy and less motivated). I wouldn't recommend doing it more than a few times, definitely not as a daily/weekly habit.
come to Poland
here most of us are smoking weed from years.
And what is true - it makes you more lazy. But! All depends on you. I feel like it is better to smoke a spliff than drink a beer. But I know what that means and I know what it is doing wrong to us because I felt it many times.
But. It is about fight with your lazyness
and my point is that you can smoke weed and be crative and full of energy at a same time.
It just depend on your mentality.
What is dangerous, that you never never know what will happens to you.
So generally. Everything is for people - but if you are young better to keep away from any boozers because it might ruin your life.
You never, never know - but chances are quite large.