Add warning about Discord TOS

I kinda forgot to add this... for over a year... whoops!

Author: NotNite

src/content/docs/using/install.mdx

@@ -8,6 +8,12 @@ import { FileTree, LinkButton } from "@astrojs/starlight/components";
 
 There are several ways to install moonlight. It is suggested to use the installer or CLI if you are not a developer.
 
+:::caution
+moonlight (and other client mods) are against the Discord terms of service. **Client mods are a risk** - if this makes you uncomfortable, don't install them.
+
+Despite that, we try our best to ensure your account and system is safe. There are no reported bans from using moonlight, and moonlight disables tracking and analytics to be less detectable. Discord is more focused on fighting spam and API abuse than client modders.
+:::
+
 ## moonlight installer
 
 <LinkButton href="https://github.com/moonlight-mod/moonlight-installer/releases/latest/download/moonlight-installer.exe" icon="seti:windows">Download</LinkButton>