The site is ww4. 9animes.org. (No space in between) I have had no problem watching Animes for free on Firefox and having UBlock Origin (Which Google recently discontinued for Chrome) prevents any ads.
That being said, that was when I was using my home internet. I had no notifications of accessing copyrighted material or the like. I had no problems. What is the likelihood that say, the school would get red flags from me using that site? Could it still work while I am here living on Campus? Should I try to find a VPN? (I am a bit of a rookie with this kind of thing).
Get a VPN. Don’t use public wifi without a vpn. Using public wifi without a VPN is like having sex with random hookups without a condom.
Another alternative would be to download your anime of choice before hand and keep it on your device to watch. You could even store it on say google drive or something as they don’t pay much attention to the content of videos unless you upload them to youtube. If you need to you can pay the $30 a year and get the cheap premium package for 0.1TB Which isn’t that bad all things considered if you just use it to store files in transit.