saving force.com site reference fields

Thanks Pablo. 

I’ve considered the apex option - we would need to add text fields to the Feedback object where we capture the id url parameters, and then when the record is saved we use Apex to populate the lookup fields using those ids - but I’d prefer to stay away from that as it’s harder to maintain as a long-term solution for the client in this case.

And I’d prefer not to give public site users read access to all Accounts on the site - whilst its ‘low risk’ it does technically expose ALL the Account data publicly, which isn’t ideal.