Spammy traffic

[echo1]

Hi guys! There has been an unusual amount of traffic to one particular page on our blog. Now that the business is slow, I had the time to look into it. Half of that traffic is coming from India and we are a Chicago based limo service. We 'll skip why that happens part for now.
I let Hotjar record 100 session and upon reviewing them I have noticed a lot of sessions with no interaction, no mouse movement, no clicks;  just scroll and exit. My question is related to implementing a type of verification (captcha) for that blog page to see if the bots / behavior changes.
Are there any downside in terms of in page SEO for this type of implementation? 
What is good practice for something like this?

[Vanderlindemedia]

This is usually spam related traffic. Nothing you can do about but their goal is to spam either your guestbook, comment section or contact forms. Make sure it's well protected. These spam comments could run into the hundreds a day if you dont properly protect your website.

It's the number one reason why i dislike using wordpress in the first place. You gotta dedicate 5 plugins at least for security, spam and other things before having it running. And spammers do change tactics. Wordpress sites are being attacked all the time. Pretty much 60 to 80% of traffic on blogs are garbage.

[Martijn_Scheijbeler]

My two cents, just let it go. There is likely downside to 'hiding' your content behind a captcha just to see if the traffic is real or not. Especially as it could be something that is hurting SEO as you're loading another script to the page.  In the end, what's the downside of having a ton of traffic going to a page, maybe a few extra dollars in server costs but usually I haven't seen any other issues.