If it had been worded something like "Startup A is an alum of Incubator A and they sneaked into Incubator B's Demo Day in an attempt to snipe Startup B's invest

If it had been worded something like "Startup A is an alum of Incubator A and they sneaked into Incubator B's Demo Day in an attempt to snipe Startup B's investors... yada yada yada..." it would be only slightly more vague than it is now. I don't see why naming "YC" and "500 Startups" makes it much different. The actual companies were not named. My guess is this thread lives.