Informal Letter: Social Media: A devil in disguise. [Disguise = Costume]

Informal Letter:
Imagine that you are Raju. Your friend Mohan spends a great amount of time on social media. Write a letter to him with the help of the points given in the below snippet. You may add your own points to support your subject.

Social Media: A devil in disguise. [Disguise = Costume]
Social Media sites are very popular among teenagers. They spend majority of their free time on these sites, socialising with their friends. Teenagers are becoming addicted to these sites. Teenagers need to be guided to use technology wisely.

Now, Concentrate on the letter. 

7G, Sonia Apartment, 
Rainbow Colony, 
Mumbai - 400017.
23rd July, 2019.

Dear Mohan,
I received your letter yesterday. It is great to know that you are doing so well in cricket. But I am disheartened while your academic score has drastically fallen. I know the reason for this is your addiction to social media sites like Instagram, Facebook and Snapchat.

You are always online on these sites and greatly active. While all these sites are amazing platforms to share your lives with people and discover people worldwide, too much of anything is harmful. You are a bright student and could explore your potential if you planned your time well. Decide on a time slot for logging on to these sites and do not open it at any other time. Always remember that self-control is the key to success. These sites are highly addictive and if not checked they could have drastic consequences. Being your best friend, I am concerned about you.
I hope you think over this and act wisely. Eagerly waiting to see you soon.
Yours lovingly,