Has any individual ever been charged with fraud for misrepresenting their wealth? I understand its likely that the company faces fines and such, but I've never heard of an individual getting in trouble.

I doubt simply "finding out" would guarantee enforcement. They'd need time and an inclination to care, and tangible evidence. If there was no crime by the issuer other than being a little too trustworthy, it's unclear what the prioritization and penalties would be.

I suspect the bigger risk is that the buyer – the not-really-'accredited' – has some dispute with the company and sues, causing problems because the various assumptions-of-competence (that come with 'accredited' status) are then voided. It gives a bad-faith or disgruntled investor more leverage over the issuer.

Well, the company could certainly be in hot water for selling to a non-accredited investor, but I've yet to see anyone who can point to a penalty that can be levied against the lying investor.