Eric Stonestreet says the cyberbullying endured with by his female "Modern Family" co-stars is unconscionable, and that their social media harassers are "cowards."

“It’s the girls, Ariel, on our show, and Sarah and Sofia," he told FOX411. "It’s rough, and people are really super mean, and they’re cowards on social media.”

Stonestreet said Ariel Winter, Sarah Hyland, and Sofia Vergara get it way worse than he does.

"I don’t understand it," he said. "If you won’t say it to my face, why would you say it on Twitter and Instagram?”

Known best for his character Cameron Tucker on the Emmy-award winning comedy, Stonestreet is using his celebrity to help raise cancer awareness for the Ready. Raise. Rise. Cancer Awareness Program.

Stonestreet was in Los Angeles in 2001 and his mother was in his home town of Kansas City when she got the news she had uterine cancer, and later found she had kidney cancer, too. With “good doctors and good treatment she survived, and she's been doing great," Stonestreet said.

The experience led him to become an advocate for cancer research. For the second year he is teaming with Ready. Raise. Rise, which donates money to cancer research and provides information about immunology research.

As for Stonestreet's future post-"Modern Family," the 44-year-old has aspirations of living in New York City and leading a less ‘Hollywood’ life.

“I’ve never lived in New York. I’ve never done a play off or on Broadway so I think that’s in my future," he said. "Have that experience – get a little apartment in the city and grow a beard and walk around with earbuds in my ears, and a stocking cap and a big giant scarf.”

Click for more information about Ready. Raise. Rise and its #RaiseYourFlag social media initiative.