I sometimes wish my grandparents were dead
Why would you ever wish your grandparents to be dead?
I just think my grandparents are annoying
Even though you find your grandparents annoying, it's not appropriate to wish they would die. You only have a limited amount of time with your elderly family members. Try to spend it wisely.
I'm not sure what you are talking about.
Wishing someone dead is a pretty terrible thing to do. Really try your best to cherish your time with your grandparents. As they age and become older you simply never know how long they have.