In order to avoid any spammy actions, you can have captcha field on your form.
This smart captcha will automatically detect the robots and spammy data and helps you to distinguish human to get only valid data.
Most of the time, user find it difficult to understand and abandon the form just because they don’t able to understand the captcha.
Captcha field should be very clear such that user can understand it in fraction of seconds. In FormGet, you will get neat captcha field which is easily understood by the user.