Delete all the urns and graves on the lot like any other object, and ghosts won't appear. But beware, once you delete them there's no way to get them back.
Other option is, if you have one of later expension packs, that's also allows sims to have their own inventory (I believe every EP since Nightlife on has this option) you can place urns and graves in the inventory of some sim living on the lot, either for all the time or only during the night, as ghosts only appear then.
LOL perve
you can't
Delete the tombstone.
Cant
you can't get rid of your maid yet, you have to complete he entire the sims 2 game first then talk to to your maid and see what she needs or wants to get rid of her!!!
yes you can
Call the exterminator.
You go to edit and remove them idiot
It will go away on its own after a few days
Just wait and they will go away
Ignore them until the care worker comes
No you cant because that is one thing you can not erase