Threats towards the Bob Brown Foundation's Tarkine blockade have taken a "darker" turn, a timber advocate says, and things could get ugly for the protesters.
Pro-forestry advocate Kelly Wilton says frustrations are at an all time high among "everyday people".
"What they're doing is bloody dumb, and stupidly dangerous," she said, in reference to the blockade, which was freshly resurrected over the weekend after a winter break.
"I don't know how environmentalists continue to get away with it.
"They continue to flout the law and cause damage and vandalism."
A candidate for the Legislative Council seat of Windermere, Ms Wilton has been running the Support Tassie's Timber People Facebook page for the past eight years, and said the comments had gotten steadily more violent.
"Normally it's people just blowing off steam," she said. "But some of the comments lately were darker, a little bit more serious.
"I'm worried there's going to be vigilantes who take it into their own hands this year.
"Can you blame them? The government's not doing anything (to stop the environmental protesters).
"In the meantime, it's really quite offensive to everyday people who have to abide by the laws."
A government spokesperson dismissed the blockade as a "pointless stunt".
"The people of the North-West made their views known very clearly at last year's state election," they said.
I'm worried there's going to be vigilantes who take it into their own hands this year.Kelly Wilton
Bob Brown Foundation campaign manager Jenny Weber said the protesters were well aware of the threats, but that it was the Facebook page managers' responsibility to moderate comments on their pages.
"It is something that we have to face," she said. "We always act non-violently... we have a zero-tolerance policy of violence.
"We know, too, that we are the ones that face the law, we know we are liable to be arrested, we are waiting for the police to arrive.
"It's up to Kelly Wilton and Peter Benson to moderate their own Facebook pages."
She said accusations from Ms Wilton of vandalism were unfounded, and paled in comparison to the damage caused by logging.
Police said they had not received any complaints in regards to damage so far.
"Police are aware of damage caused but at this stage an official complaint has not been received," Acting Inspector Tony Stewart said.
"Police ... will continue to monitor activities in the area.
"Any illegal activity identified will be investigated by police and dealt with under appropriate legislation."