Harrison expressed his displeasure on his Twitter account Tuesday.
"I'm absolutely sure now after this last rule change that the people making the rules at the NFL are idiots," Harrison said.
Teammate LaMarr Woodley also spoke out through his Twitter account.
"Thoughts on "the steelers rule"??? lol im sorry that im not sorry we hit 2 hard," he wrote.
Steelers president Art Rooney II told USA Today that he's reserving judgment for now.
"I'm not going to say I'm opposed to it. I would hope that it's something that is used judiciously, that is sort of reserved for repeated type of conduct," Rooney said. "I think if it's handled that way, it'll probably be effective. It's still under discussion."
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