Megan Mennes, from Houston, Texas, posted a picture on Instagram of her son Quinn playing happily in the garden after he was recovering from an illness. 

She was not expecting a cruel response from an internet troll. 

However, the proud mother was quick to respond and posted an open letter on her blogsite to the person who made the offensive comment: 

"I don't want to make assumptions about you, but I can guess from your immaturity and ignorance that you know little about the helplessness that parents feel when caring for a sick infant with respiratory issues.

Quinn was sick last week, but was feeling much better by Friday. 

We decided to sit in the backyard and soak up the sun after school. 

There aren't many things in this world more beautiful than seeing your recently-ill child light up in a smile, and I snapped a few photos to celebrate his recovery, then posted them on Instagram with the hashtag “#downsyndrome.

The fact that you find my child ugly is one thing. 

You are entitled to your opinion. But the fact that you intentionally search #downsyndrome to find pictures to insult (sadly, Quinn is not the only victim of your behavior; I came across many other inflammatory responses) is both childish and sad.

What about purposefully seeking out pictures of our children? What about the fact that a beautiful 

photograph of my son was tarnished by your hatred?

That's not a joke. That's cyber bullying. Needless to say, I reported your profile.

This will not be the last time someone discounts my son because he is different.

It will not be the last time someone makes a joke at his expense, but to actively seek out actual people to tease goes beyond cruel. It's inhuman.

I simply hope my own children learn to look past ignorant comments and actions and treat others with respect and dignity. We all deserve it, even you."

Read more: Define Crazy