Why is there no interaction between seniors and juniors?

Actually it do exists. When you come inside some club. But yeah till that time I too felt there is no communication between seniors and juniors. The possible reasons are –
1. Ragging fear- juniors don’t want to get ragged and seniors don’t want to get expelled.
2. Hostels – juniors are happy with people from their age and so is the case with seniors.
3. People out there don’t allow any interaction between seniors and juniors.
4. I feel there should be orientation from the seniors to the juniors.
5. The population of Vit.
6. Girls- people are too busy with them. They don’t want to interact with seniors.
7. Being too happy of coming in vit and being too happy of getting their futures secured.
8. Some have lack of helping nature.