Can I answer obvious scam calls and then cuss out the would-be scammers for as long as they'd let me?
Why do you want to stay on the phone just to curse at them?
Because I won't lose money by cursing at them.
Although you are frustrated by scammers, staying on the phone just to curse at them is unproductive. It would best to just hang up the phone and be careful about what you say when talking to scammers.
I'm stupid. How can I not see that I could be scammed?
Sometimes it is good to stand your ground and tell people when they've gone too far. However, it's unnecessary to carry it on when you can just say what you have to say and then end the conversation.