Do all dead people become ghosts?

[Menaceman]

BGHS2

the cause of death is
1. death by disease
2. old age
3. drowning
4. electrocution
5. burning
6. starvation
7. satellite
8. death by flies
9. scared to death

With expansion packs installed you can also die in the following ways;
10. Eaten by a cow plant
11. Running with scissors (download from sims2.com)
12. Vampires burning in the sun

There all the extra ones I can think of.  

[Teh Maddest Hatter]

i was on the dreamer family and i had just moved a servant family in (they slept in a small shed next door) and one night the ghost of the mum showed up she kept crying for her son but wouldnt go inside?