I don't think you quite get why people sundive. Usually it means evading a very expensive repair bill that can tot up even into the millions with VHFs. As well as getting back any lost guns people have had shot off that have costed them loads. Suicide is fine as it is man, damaging the ships after the decompression wouldn't be very logical and would be incredibly irritating.
Once your dead your dead, if you want to go harcore with the RP then rename your character every time you die. "You only have one life" and all that jazz.