The answers to the following clues will have something in common.

1. One way to quit a bad habit
2. Like an accident waiting to happen
3. It would probably be a zero in a diving competition
4. Earthquake or hurricane, for two

HINT:
Bad reviews

Answers:

1. Cold turkey
2. Time bomb
3. Belly flop 
4. Natural disaster

Credit:
Nancy Kavanaugh (#1-3)