Why is Snapchat logo a ghost?

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Tags

1. #moments
2. #named
3. #snapchat
4. #halls
5. #disappear
6. #those
7. #infamous
8. #other
9. #behavior
10. #psychology
11. #killah
12. #lives
13. #passing
14. #chillah
15. #based
16. #ghostface
17. #ghost
18. #sidenote
19. #living
20. #emulates