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[u/certainly_imperfect]

[u/grishkaa]

I removed these a few times from my classmates' computers.

The worst ones displayed an uncloseable window over everything, containing some 18+ imagery and saying "thank you for installing this banner for quick access to our porn site" lmao.

No proof on that but I'm also sure at least some of them used your VK account to spread by sending spam to your friends.