Possible Clues:

• Lout hangs around during attack
• Buffoon's laughter's concealed aggression
• Attack on street suppressing expression of enjoyment
• Louts hang out for violent attack
• Acceptable to snigger in the street? It's offensive!
• Sally foolishly hangs out about 50
• No laughs disrupted Evert's closing attack
• Vigorous attack
• No going back by good person — evidence of amusement held to be offensive
• Attack one left lashing out indiscriminately