If you have nothing to hide, show me your computer.
If the FBI takes it seriously, unless they have other calls ahead of yours, they would probably want to look at your computer for evidence.
Do you really want that?
Your financial records, guns you have bought, research you have done.
Curiosity caused you to look at how to make bombs from stuff under your kitchen sink?
It is better to ignore some things.
If you have nothing to hide, show me your computer.