The AFL Players' Association says it is taking seriously any threats made to players via social media as the impact of free agency continues to bite on AFL clubs and supporters.

Adelaide forward Kurt Tippett has been subjected to a death threat this week after walking out on the Crows on Tuesday, telling them he wanted to be traded as several clubs circle the talented forward.

The AFLPA has reported the threat to police.

Tippett's manager Peter Blucher said the threats made on social networking site Twitter on Thursday morning were "despicable and not remotely funny"

"How would you feel if it was your son?" Blucher told The Age.

"This person should be made an example of so this sort of stuff doesn't happen again."

Tippett walked from Adelaide on Tuesday, telling the Crows he wanted a trade as several clubs put up their hands for the talented forward.

The Brisbane Lions, Gold Coast, Carlton and even 2012 premier Sydney have all expressed interest in the 25-year-old.

Tippett told the Crows that he would seek a trade with a rival club in this month's trade period.

In the aftermath of his announcement — made to fellow players via SMS — Twitter received a barrage of feedback from fans via social media.

The person who sent the initial threat to Tippett via Twitter has since reportedly declared it was a joke.

AFLPA boss Matt Finnis says they are taking the threat towards Tippett seriously.

"Regardless of the intent of, or the motive of the person that is posting these kinds of tweets, we shouldn't accept, we shouldn't tolerate it," Finnis told 3AW.

“Whether or not there is a fear that the person is going to follow through on it, I don't think any of us should condone it.

“We certainly will treat it very seriously and we will refer to the police any social media engagement that we feel goes across the line.”