The thing is, you would need to review each of the complaints to know which is which. If you're providing no support and because you're not taking money for the service there is no real liability (depending on the contract) being a non-customer would mean, if they do something incredibly wrong you need to get a new provider.
If you're not a customer, you can't expect support. If you want support, pay $10 and then fill the ticket. It just annoys me when people complain about not getting support when they've not paid for anything.