A paid VPN with all features including ad/malware blocking and tracker protection is a good base as it hides your IP and cuts a lot of sketchy ads and domains. Still pair it with a browser ad blocker and keep your system patched. A VPN helps privacy but on its own it won’t stop all risky content on free streaming sites. More on reddit.com

Bro, if you pirate on school WiFi, Matthew McConaughey is gonna descend from the ceiling tiles and personally tell you to cut that shit out (but actually, I doubt the IT department cares about it) More on reddit.com

Why not just searching the movie on rarbg or 1337x and torrenting it?

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123movies acting up 123 movies has been taken down more times than I can count. I think the last legit version of it was removed like 4+ years ago. What remains are probably just shitty clone sites of the original, which are more likely to have problems, bad quality, malicious ads, etc. You can't be beholden to a single streaming site. They come and go ALL THE TIME. Go to FMHY or to the r/piracy megathread and pick a new site. I'm using like 3 different types of addblock and I refuse to turn them off. Don't use multiple ad blockers simultaneously. They can interfere with each other and end up giving you a worse result than any one of them alone. Use one GOOD ad blocker. Ublock Origin is all you need. More on reddit.com