security has like 3 rules, 1) don't fight. 2) don't come onto the ground, 3) don't let a beach ball get onto the field.
Apart from that, fill your boots with as much heckling and abuse as you like. Was at a game a few years back against India. Their man on the boundary got a beach ball and instead of doing the fun thing and chucking it back over the fence gave it to the security guard who popped it. Poor bloke got abused so much in the next 2 overs he asked his captain to be moved in the field
.
edit: former prime minister of australia...
like a boss.