Ken Livingstone, George Galloway and Frankie Boyle led the dissenting voices as tributes were paid to Margaret Thatcherwho has died at the age of 87 following a stroke.
"Every real problem we face today is the legacy of the fact she was fundamentally wrong," the former London Mayor said.
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Sinn Fein leader Gerry Adams pointed out her "shameful" role in the hunger strikes, while Respect MP Galloway tweeted: "Tramp the dirt down," a reference to an anti-Thatcher Elvis Costello song.
The Bradford West MP faced a barrage of twitter criticism, with one user calling him an "odious, vile, heartless opportunist."

George Galloway

Tramp the dirt down.
The phrase 'no state funeral' trended on Twitter, as debate raged about how the occasion should be marked.
Controversial comedian Boyle tweeted about the "terrible news" - linking to a video of Celebrate Good Times, by Kool & The Gang.
Frankie Boyle

Thatcher being dead is a lot less tragic than Cameron being alive
And outspoken footballer Joey Barton said Thatcher had been "despised by many."
Joseph Barton

Shouldn't be a state funeral. She was despised by many. Mourning in the South. Celebrations in the North.
Many left-wingers urged restraint as the news broke.

I hope that people on the left of politics respect a family in grief today.
The Daily Telegraph closed comments on its report of her death "out of respect", and political blogger Guido Fawkes shut his site "as a mark of respect".
Tony Gallagher

We have closed comments on every  story today - even our address to email tributes is filled with abuse
Livingstone told Sky News the former Conservative prime minister had led millions of people out of work.
He said: "Of course she was popular, she was offering people their homes at a cut price. But she didn't build any houses.
Mark Thompson

Ken Livingstone should probably keep a lid on it today.
"She created today's housing crisis, she produced the banking crisis, she created the benefits crisis. It was her government that started putting people on incapacity benefits rather than register them as unemployed because the Britain she inherited was broadly at full employment.
"She decided when she wrote off our manufacturing industry that she could live with two or three million unemployed and the legacy of that, the benefits bill that we are still struggling with today.
"In actual fact, every real problem we face today is the legacy of the fact she was fundamentally wrong."
He also said that it was to Tony Blair's "shame" that he "broadly carried on" most of her policies.
Lord Sugar

Some of the despicable scum tweeting foul mouth comments on my Baroness Thatcher tweet, were still drinking milk from a teat in the 80's
Adams, the Sinn Fein president, who was banned from the airwaves by Thatcher's government during the Troubles, said she would be "especially remembered for her shameful role during hunger strikes. Her Irish policy failed miserably."
Louise Mensch

Pygmies of the left so predictably embarrassing yourselves, know this: not a one of your leaders will ever be globally mourned like her.
A Facebook page, called Is Margaret Thatcher Dead Yet? had been liked by almost 40,000 people.
Mark Wallace

And the NUS Conference just applauded the news. Sickening. Bastion of the indecent left.