I'm going to tell telemarketers I'm dead
What makes you want to tell telemarketers you're dead?
Because it's fun to make telemarketers frustrated.
Be kind, but firm and clearly say no to any of their inquiries. Let them know they are not welcome to call you in the future and hang up immediately.
What if the telemarketer wont stop bothering me?
You can always ask to be put on a no call list. That way you aren't making their job harder.