I'm going to make fun of someone else's dead family member
That feels very disrespectful. Why would you make fun of them?
I just thought it would be funny. I have been doing it for a while now.
In no circumstance is it okay to ever make fun of a grieving family. You need to show respect and kindness to people in this tough time and to be respect of everyone and the deceased. Failure to do so will make you seem uncaring.
I just wanted to know how they were doing. I am sometimes uncaring though.
It is okay to wonder about how people are dealing with losing someone, but it is not okay to make fun of their lost loved ones. I think it is more appropriate for more qualified individuals to conduct social experiments rather than you doing jokes just because you are curious about it.