I do not take pictures of the deceased out of respect but for some it does help the grieving process so it is entirely subjective to the individual taking the picture and the reasning behind it....if it is for profit (such as with famous deaths) then I do find it to be unacceptable...if however it is family wanting something to use as a memory tool then I find it completely acceptable.

second question is NA to me but I have left pictures of the deceased from the past on graves or tombs to show the person as real and that others can remember the things the person did while alive. Maybe a pic of them in their favorite activities or with someone they cared for etc. as example.

I do not find this to be creepy or offensive but as I said before it depends wholely on the reasoning behind it.

Photography is not a "practice" among my family at funerals, neither at the service nor at the reception afterwards....I do not find it to be an event of joy and celebration but rather one of deep respect for the one who has passed.

No particular religion has formed my views or opinions on this matter but rather common respect for the deceased and the family involved in the situation.

I have no photos of things I have left at tombstones etc. but if I did I would more than gladly share them with you as it is a way of keeping the person alive in the hearts and minds of others.