Former Herald Sun chief football writer Mark Robinson has called on the AFL to come down hard on Geelong star Bailey Smith.

After coming under fire for his social media antics at the club's Mad Monday celebrations, Smith landed himself in hot water again this week.

In a now-deleted Instagram story, the Geelong midfielder posted a video of former Footy Show host Sam Newman criticising veteran journalist Caroline Wilson.

Smith's post, and his Mad Monday post also featuring Wilson, triggered the AFL to warn Geelong over the star player's social media presence, according to The Age.

Robinson welcomed the league's response and said it was time Smith was pulled into line.

“I spoke about this about two or three weeks ago and it really p**ses me off, a lot of these young punks online say, ‘g

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