HAPPY HALLOWEEN I

1. Threats used to persuade

2. Mail that can't be delivered or returned 

3. Binges on bad news on the Internet

4. Hired pen

HAPPY HALLOWEEN II

1. Masked explorer

2. Masked athlete

3. Masked hero

Answers:

Happy Halloween I

1. Scare tactics

2. Dead letters

3. Doomscrolls

4. Ghost writer

Happy Halloween II

1. Scuba diver

2. Baseball catcher

3. Lone Ranger