10/16/2012 05:45 EDT | Updated 12/16/2012 05:12 EST

Calgary mom helps get man fired after he posts rude comment about dead teenager

CALGARY - A Calgary mother who started a group that's policing Facebook comments about dead teenager Amanda Todd believes her sleuthing got one man fired from his job.

Christine Claveau said Tuesday that she has read hundreds of insulting comments about the 15-year-old British Columbia girl since she killed herself. But it was one particular remark by an Ontario man, the day after Amanda's suicide, that upset her the most.

The man used a derogatory term and wrote that Amanda deserved to die.

"It made my stomach turn that someone could write that, after this person had committed suicide. It was terrible."

Claveau said she clicked the link to the man's Facebook page and his employer, Mr. Big & Tall, was listed. She then sent an email to the men's clothing company detailing what the man had done.

Dave McGregor, the president of Grafton-Fraser, which owns Mr. Big & Tall, confirmed in an email the man no longer works for the company.

"Our company ethics are based on tolerance, respect and fair and honourable treatment of all individuals, internally, with our customers and the population as a whole," he said.

"We have zero tolerance for the mistreatment of others no matter what form it takes."

A month before she killed herself, Amanda posted a video on YouTube describing how she had been sexually exploited by an online stalker and bullied by her peers. Her story has sparked more than 100 memorial pages on Facebook and renewed calls across the country to fight bullying.

Claveau said she was moved by what happened to Amanda because she was also bullied in junior high and high school.

While reading and reacting to the Facebook comments about Amanda, she connected with two other women from southern Alberta who shared her views — Melissa Buck and Lindsay Jane. The trio formed a Facebook group called We Are Against Bullying, which so far has 700 members.

Claveau said the group has reported nearly 1,000 offensive comments to Facebook staff and a few others to the RCMP.

"We're trying to call out all cyber bullies," said Claveau. "We're really trying to make a difference."

The RCMP said they've received thousands of tips and continue to investigate the sexual exploitation and an assault Todd endured before her death.