SPACs are basically an incorporated bag of money, so yes, while they technically have the same disclosure requirements as any other public company the disclosures won't tell you anything. There is no Form S-1 for SPAC acquisition targets.
A conventional IPO has a number of roadblocks for fraudsters. First they have to convince a reputable investment bank (like Goldman Sachs) to take them on as a client. Then the CEO and CFO of the company have to go on a grueling road show where they talk to groups of sophisticated investors, present their business prospects, and answer difficult questions. The IPO doesn't happen if those investors aren't willing to pay up, or if the investment bank feels like management is not transparent about their realistic business prospects.
With a SPAC you have none of that. You can have a slide deck and a webcast and make outrageous claims and nobody will call you out on it. The company and SPAC sponsor can dump their shares on retail investors who think they are investing alongside the executives and SPAC sponsor, when in reality they are their exit liquidity.
