diff --git a/src/file-viewer/backend.tsx b/src/file-viewer/backend.tsx
index 6e28496c0f3451ab784cdaea27a264fd91839bf1..7ea041ee08a316548e1864390b7ec1ddffd64876 100644
--- a/src/file-viewer/backend.tsx
+++ b/src/file-viewer/backend.tsx
@@ -13,8 +13,20 @@ app.get("/file/*", async (c, next) => {
   const ua = c.req.header("User-Agent")?.toLowerCase() ?? "";
   const lofi = ua.includes("msie") || false;
 
-  // Discord ignores 'robots.txt' which violates the license agreement.
-  if (ua.includes("discordbot")) return c.body("Forbidden", 403);
+  // Some robots ignore 'robots.txt' which violates the license agreement.
+  if (
+    (!ua.startsWith("mozilla/")) ||
+    ua.includes("headless") ||
+    ua.includes("discord")
+  ) {
+    return c.body(
+      "Forbidden\n\nYour user agent, " + JSON.stringify(ua) +
+        ", appears to be an automated. Please do not automate " +
+        "access into my file viewer. I do not appreciate scraping. " +
+        "Instead, please view manually in a standard web browser.",
+      403,
+    );
+  }
 
   let rawFilePath = c.req.path.slice(5) || "/";