I just looked this up and they are actual gvernment forms you're supposed to fill out if your business acquires property (A) and to discharge debt (C). So I guess they think these forms somehow allow them to magically steal stuff.
Here's a pdf from the IRS site: https://www.irs.gov/pub/irs-pdf/i1099ac.pdf
I think eventually you reach a point where previously played notes would lose all of their energy, meaning there's probably an upper limit on how loud it would get for an observer at the end. Something something Doppler effect.