It'll lead to kick offs.
If Everton are a goal up at the time and then a walk out is happening and then Arsenal draw level guess who gets the blame?
Stay in your seats and chant none stop sack the board in between cheering thre team on. The message is more loudly received than a walk out.
I remember the Kopites did it over seat prices. It was patchy and pitiful.
At a guess I'll say Keane or Coleman.