A director of the trendy advertising firm behind the controversial Woolworths Anzac campaign has hit back at reports the firm was hiding from the public, saying she took a sensible precaution to protect her staff from the torrent of "vulgar and abusive tweets".

Madeleine Preece, director and executive producer of Australian agency Carrspace, told Fairfax Media the firm's management temporarily deactivated its Twitter account due to intense cyber bullying, while their website had technical issues due to the heavy traffic.

"Vulgar and abusive tweets": Madeleine Preece.

"We have not been in hiding. Unfortunately, we have had technical issues with our website due to the volume of traffic in the last 24 hours.

"We never removed our website. We deactivated the Twitter account due to trolling and vulgar and abusive tweets that were affecting the team."