Actually, the FCC has several ways for you to report spoofing: https://consumercomplaints.fcc.gov/hc/en-us/articles/2026543...
I've reported any number of robocalls-to-do-not-call numbers to the FCC, and exactly nothing has happened. I have no faith that complaining about spoofed caller ID will cause any action at all.
I'm pretty close to the point where I just leave the ringer on my phone off permanently. If somebody calls and I want to speak to them, I'll eventually call back. This sucks because I do speak to my parents on the phone, so we end up playing a lot of phone-tag trying to reach each other.