diff --git a/src/app/utils/consolePasteScamWarning.ts b/src/app/utils/consolePasteScamWarning.ts
new file mode 100644
index 000000000..72d750e28
--- /dev/null
+++ b/src/app/utils/consolePasteScamWarning.ts
@@ -0,0 +1,58 @@
+// This is probably not very accurate, but doesn't really matter I suppose
+function isDockedDevtoolsLikely(): boolean {
+  const gapW = window.outerWidth - window.innerWidth;
+  const gapH = window.outerHeight - window.innerHeight;
+  const threshold = 160;
+  return gapW >= threshold || gapH >= threshold;
+}
+
+export function installConsolePasteScamWarning(): void {
+  const BANNER_STYLE =
+    'font-size:56px;font-weight:900;color:#ff0033;background:#1a0006;padding:16px 24px;border:6px solid #ff0033;line-height:1.1;';
+  const BODY_STYLE =
+    'font-size:22px;font-weight:700;color:#ffb3c1;background:#120008;padding:14px 20px;line-height:1.35;max-width:920px;';
+  const CONTRIBUTE_STYLE =
+    'font-size:18px;font-weight:600;color:#a8d4ff;background:#0a1520;padding:12px 20px;line-height:1.35;max-width:920px;';
+
+  const spamWarnings = () => {
+    const repeat = 15;
+    const betweenPairsMs = 300;
+
+    const emitPair = (index: number) => {
+      console.warn('%cSTOP', BANNER_STYLE);
+      console.warn(
+        '%cIf anyone told you to paste code or text here, you are being scammed. Close this window, do not paste anything, and report their account.',
+        BODY_STYLE
+      );
+      if (index + 1 < repeat) {
+        window.setTimeout(() => {
+          emitPair(index + 1);
+        }, betweenPairsMs);
+      } else {
+        window.setTimeout(() => {
+          console.warn(
+            "%cIf you know what you're doing, check out our GitHub and contribute: https://github.com/SableClient/Sable",
+            CONTRIBUTE_STYLE
+          );
+        }, betweenPairsMs);
+      }
+    };
+
+    emitPair(0);
+  };
+
+  let devtoolsWasOpen = false;
+
+  const check = () => {
+    const devtoolsLikelyOpen = isDockedDevtoolsLikely();
+    if (devtoolsLikelyOpen && !devtoolsWasOpen) {
+      spamWarnings();
+    }
+    devtoolsWasOpen = devtoolsLikelyOpen;
+  };
+
+  window.setInterval(check, 1500);
+  window.addEventListener('resize', () => queueMicrotask(check));
+
+  queueMicrotask(check);
+}
diff --git a/src/index.tsx b/src/index.tsx
index 4f6dfb004..1721755d5 100644
--- a/src/index.tsx
+++ b/src/index.tsx
@@ -22,8 +22,10 @@ import type { Sessions } from './app/state/sessions';
 import { getFallbackSession, MATRIX_SESSIONS_KEY, ACTIVE_SESSION_KEY } from './app/state/sessions';
 import { createLogger } from './app/utils/debug';
 import { getLocalStorageItem } from './app/state/utils/atomWithLocalStorage';
+import { installConsolePasteScamWarning } from './app/utils/consolePasteScamWarning';
 
 enableMapSet();
+installConsolePasteScamWarning();
 const log = createLogger('index');
 
 document.body.classList.add(configClass, varsClass);