Tickets in the area were purchased as part of a group public sale.
"At this point, we are still working through the process [to see] if we can identify the particular individual,'' AFL spokesman Patrick Keane said.
Any punishment, such as a ban from the stadium, will be made in consultation with the AFL.
The man was wearing a Hawthorn T-shirt and had a child with him. His name and details were not taken.
