Comment blacklisting works well, but what if you actually want to stop someone from even reading your blog? This plugin will take care of that for you.
It uses .htaccess file modifications to deny access to your blog from particular IP addresses (Deny from) and then follows up with an ErrorDocument 403 redirect to a URL of your choice. It doesn’t hook into WordPress, which makes it a lot faster due to no database or PHP calls.

WP-BlockYou

A plugin that can be used to block or "ban" users via their IP address from viewing your blog, and then redirecting them to a URL of your ch …

Trusted Accounts

Stop bots and scrapers without affecting real visitors.
Trusted Accounts protects your WordPress pages in the background. Each request is checked (allow / challenge / block, typically under 50 ms) — we stop bots before they even reach your site, so you get effective bot, scraper & spam protection without CAPTCHAs. On the page, our SDK sends behaviour data for additional real-time security. Works for anonymous traffic and for logged-in users.
Try the Admin Panel without installing: <a href="https://admin.trustedaccounts.org/home?demo=true" rel="nofollow ugc">Admin Panel Demo</a>
Use the code EARLY-WORDPRESS-BIRD at checkout — Get 3 months free on the Starter suite. Limited to the first 50 early birds. <a href="https://admin.trustedaccounts.org/register" rel="nofollow ugc">Get started at Trusted Accounts →</a>
<h4>What Makes Trusted Accounts Special?</h4>
✅ Invisible to Real Users – Protection runs in the background; no annoying CAPTCHAs or steps for legitimate users 
✅ Request + Behaviour – Request check before the page loads (under 50 ms); real-time behaviour data on the page 
✅ Bot, Scraper & Spam Protection – Block or challenge bots, scrapers and abusive traffic before they reach your site 
✅ Admin Panel – Deep insights into bots and scrapers on your site; Advanced Crawler Management 
✅ Works for Everyone – Guests and logged-in users; for communities, distinguish real vs. fake users 
✅ Easy Integration – Works with any WordPress theme; simple setup with API keys

Full Website Security: Bot & Spam Protection from Trusted Accounts

Protect your pages from bots, scrapers and spam — fully in the background and invisible to visitors. We stop bad visitors before they reach your site.

WP-BlockYou vs Full Website Security: Bot & Spam Protection from Trusted Accounts