He said: "It is unclear to me why the legal department of Liverpool should have been acting on behalf of the Claimant in his private capacity".
The posting was removed following a solicitor's letter on behalf of the claimants.
The company later agreed a settlement with solicitors Leigh Day on behalf of 30,000 claimants affected by the dumping.
Simon Myerson QC, who is instructed by Tandem Law on behalf of the claimants, says his clients suffered a variety of abuses, including castration.
The posting was accessible for six weeks between April and May 2007 when it was removed following a letter from Equity, the actors' union, on behalf of the claimants.
Problems highlighted by Brake include: Failure to pay, or abruptly ceasing without warning to pay, the housing cost element of universal credit to private landlords on behalf of vulnerable claimants, leaving them at risk of eviction.
An earlier version said one of the problems people faced was the failure to pay, or abruptly ceasing without warning to pay, housing benefit to private landlords on behalf of vulnerable claimants.
David Sherborne, speaking on behalf of the claimants, also said MGN's comments were "deliberately crafted".
A native title case would include holding secret knowledge of sacred sites, family histories and land management practices, not to mention being entrusted to negotiate on behalf of thousands of claimants.
