[cperciva]

Labelling a company as having been rejected by YC is misleading, because it implies a value judgement which wasn't made. Probably 90% of the people who visit your website leave without signing up; equally, my understanding is that most startups (even successful ones) find that 90% of angels and VCs turn them down. Do you label yourself with the names of all the potential users who "rejected" you?

As Paul has pointed out in the past, there are many reasons why a company might not receive funding, and most of them have nothing to do with the merits of the company itself. Being not accepted by YC doesn't mean that they necessarily think there's anything wrong with you -- in this case, "not accepted" is not a synonym for "rejected".