Liam Payne protects girlfriend from online abuse
The 20-year-old singer says he is worried Smith will be offended if she reads any hurtful comments written about her on social networking sites, reported Contactmusic.
"I do it lots because I worry she might read it ... In the end she's just a girl like u sat reading Twitter on her phone. She doesn't deserve to sit and read all that - who does?" he said.
The star previously defended his band's followers on the social networking site.