This is very helpful, especially everyone is at risk of being a victim of DNS hijack attacks. The effect of DNS hijack will be very severe because DNS requests are mostly unencrypted, and this creates a problem as well as room for intercepting requests by malicious attackers. Attackers will incorrectly resolve your queries and will eventually redirect you to malicious software and upon entering the site that will act as the original site you were looking for, every sensitive data you will input will be gathered by the attackers and might use it for their personal interest and put you at risk. It's a good thing that you gave all these infos for the knowledge of the mass.