Do you use forms spam protection methods on the Landing Page?

Question

Fight against spam

I noticed that there is no spam protection on the landing pages in the forms. Have there been cases of spamming such forms in your practice? Let's say, not a wandering robot, but an unscrupulous competitor.
What protection options are possible so as not to block captchas?

Answer 1

I don't really have a landing, but there are a number of forms sticking out. They just don’t write there ..
Whether or not they need to be protected depends on the amount of traffic that gets to them, if there is a lot, then the captcha will not save.
The same applies to the case when a competitor or some bad person wants to spam. They want to find a way.
To avoid spam on a small amount of traffic, it’s enough to protect yourself just a little, for example, add a checkbox "I'm not a robot" that needs to be set. and I check it after submitting the form already on the backend .. As a value, you can, for example, use a hash from the first three digits of the client's ip, which the backend gives js when generating the page. Of course, if desired, they will find and bypass this protection, but it will save you from the simplest spammers, and this is 95% of spam.