Google Ad Conversions

We are using Formidable Forms on a website and have set up the Google Ad conversion in the confirmation message. The issue is that we have been getting flooded with bots that are clicking on the ads and submitting forms. Although these forms are being marked as spam, they are also showing up as conversions in Google.

Is there javascript available that returns a success or spam when submitting a form? That way we could conditionally track them as a conversion if they are not spam.