If the US government were to take action on this, the mostly likely consequence is seizure of the funds. They'd target the site itself, which might give them a list of names (which, at the most, they'd lateral to the IRS for fun).
Otherwise, the site would disqualify the campaign and return any funds.
(edit to above): I think the likelihood of severe negative consequences is low, but there is a nonzero likelihood of being targeted for a bad experience, for varying values of "bad experiences".
Comments
If the US government were to take action on this, the mostly likely consequence is seizure of the funds. They'd target the site itself, which might give them a list of names (which, at the most, they'd lateral to the IRS for fun).
Otherwise, the site would disqualify the campaign and return any funds.
(edit to above): I think the likelihood of severe negative consequences is low, but there is a nonzero likelihood of being targeted for a bad experience, for varying values of "bad experiences".