Honestly, it might not be a terrible idea to give them a bogus date, if you're concerned about privacy and want to encourage poisoning data that data-miners are using.
If they require some sort of actual validation, like an ID document, then I get you.
I think that they went commercial at some point, stopped just being a for-fun project on YouTube, and I assume that that's what happened. Wikipedia doesn't have anything clearly indicating the transition, though.
https://en.wikipedia.org/wiki/Red_vs._Blue
kagis more
Hmm.
https://old.reddit.com/r/RedvsBlue/comments/1ct84yj/rooster_teeth_shutdown_red_vs_blue_and_where_to/
That post was dated a year ago, so I assume that there was some change that happened around that point in time.