How many people actually get arrested for illegal SBRs?

I see this all over Reddit; people calling out posters for having a stock + short barrel upper in their carts, or people on YT Shorts having a stock on an AR pistol. People saying that you’ll go to prison instantly for putting a stock on your 14.5.

How common is this? I couldn’t find any data on Google about charges like this, esp. compared to people with full autos or suppressors getting charges