Possible Clues:

• Somewhat lacking in intelligence? That's unfair
• Not quite clever enough — or too much?
• Being rather stupid is more than one should have to bear
• Article pinched? Description of thieves perhaps unreasonable
• Somewhat like 1 down? That's too much
• Derogatory remark about waist that's going too far
• Liberal hit back: 'It's unfair!'
• Criminal hit back about it being unfair
• Unreasonable or unfair - being rather dense?