diff --git a/src/solidarity.test.ts b/src/solidarity.test.ts
index a3db80a..1a10f94 100644
--- a/src/solidarity.test.ts
+++ b/src/solidarity.test.ts
@@ -149,3 +149,13 @@ test("update should chunk annotations", async () => {
   expect(update.mock.calls[1][0].output.annotations.length).toBe(50);
   expect(update.mock.calls[2][0].output.annotations.length).toBe(1);
 });
+
+test("solidarity blocks some orgs", async () => {
+  const env = process.env;
+  const s = new Solidarity({ name: "foo", id: "bar", payload: payload } as any);
+  s.config = DEFAULT_CONFIGURATION;
+  expect(s.isBlockedOwner()).toBeFalsy();
+  process.env.BLOCKED_ORGS = "jpoehnelt,baz";
+  expect(s.isBlockedOwner()).toBeTruthy();
+  process.env = env;
+});
diff --git a/src/solidarity.ts b/src/solidarity.ts
index 600ddf3..84eb142 100644
--- a/src/solidarity.ts
+++ b/src/solidarity.ts
@@ -109,11 +109,23 @@ export class Solidarity {
     };
   }
 
+  isBlockedOwner(): boolean {
+    return (process.env.BLOCKED_ORGS || "")
+      .toLowerCase()
+      .split(",")
+      .includes(this.owner.toLocaleLowerCase());
+  }
+
   async run(): Promise<void> {
     let conclusion: Conclusion = Conclusion.NEUTRAL;
     let output: { title: string; summary: string };
 
     await this.start();
+
+    if (this.isBlockedOwner()) {
+      return this.update("completed", Conclusion.CANCELLED);
+    }
+
     await this.update("in_progress");
 
     try {