NORTH Melbourne forward Drew Petrie is one of three players to escape sanction for comments made on Twitter relating to the four-match suspension of Kangaroos teammate Jack Ziebell.

The AFL said it had accepted a submission from the Roos regarding Petrie's comments and those by teammate Majak Daw, along with a submission from  Geelong regarding James Kelly's comments.

The League said the comments were "not unfair, unreasonable or excessive".

In the hours after Ziebell's suspension was upheld by the Tribunal on Tuesday, Petrie tweeted: "Lost enough sleep already tonight over that decision. Got a sore neck from shaking my head so much. Time for bed."

Later, he added: "Advice for @jackziebell. Stop being so courageous and playing footy hard the way it's meant to be played. Please turn into a softy!"

» Click here to watch Jack Ziebell's bump on Aaron Joseph

Speaking to Crocmedia's AFL Live radio program on Friday night, Petrie said his fury over Ziebell's suspension had fuelled his tweets.

"I was really angry ... I was really disappointed for Jack that he's going to miss four weeks of footy," he said.

"When I did the tweets, I was aware that there's a line you don't want to cross. I didn't want to insult anybody, the process, any of the Tribunal members or the Match Review Panel or anyone at AFL House. I just wanted to express to people my disappointment that he's not going to be there for a while."

Petrie conceded Twitter was "possibly not" the ideal forum for players to have their say on contentious issues.

"If players were able to and encouraged to make some comments in the print media, the TV shows or the radio stations, that'd probably be a better forum," he said.

"Twitter is probably seen as being a cheeky forum to speculate and to throw your mouth a little bit."

AFL General Manager Football Operations Adrian Anderson said the AFL had received a written reply from both North Melbourne and Geelong covering the comments made by the players.

Earlier on Friday, Anderson rejected claims from North Melbourne coach Brad Scott that the League is "very sensitive". 

Scott told AFL.com.au's Access All Areas that the League's swift demand for an apology following the outburst by Chris Judd's manager, Paul Connors, was proof that things might be a touch edgy at AFL House.

» Click here to watch Brad Scott on Access All Areas

Judd was banned for four weeks for rough conduct on Kangaroo Leigh Adams after his 'chicken wing tackle' case was referred directly to the AFL Tribunal by the Match Review Panel.

"Clearly the AFL are very sensitive at the moment. We saw that during the week with Adrian Anderson's response to Paul Connors," Scott said.??

This was vehemently rejected by Anderson.

"Brad has completely missed the point on why we sought an apology," Anderson said.