Queensland great Tim Horan is the latest to add his voice to criticism of Israel Folau, who continues to divide opinion and divert attention from the Waratahs' Super Rugby campaign with controversial social media posts.

Horan told Macquarie Sports Radio that Folau was better off talking religion over a backyard sausage sizzle than social media and urged the dual international to promote the Waratahs instead.

"There’s a code of conduct for social media. You can have your say, you can have your thoughts and beliefs but I think when you’re a very high profile person, you’ve got to try and keep those to yourself as much as you can," he said.

"Maybe do it over a barbeque and cooking a few sausages one Sunday afternoon. I would love to see Izzy tweet about the game coming up for the Waratahs on Saturday night and say come on everyone, get out there and bring your kids out and promote rugby in that sense."

Horan followed fellow former Wallabies George Gregan and Clyde Rathbone into the fray on Thursday, while Reds coach and confirmed suitor Brad Thorn backed Folau as an "outstanding human".