Too many people here like to be judge, jury and executioner. Lets not hang these guys yet until there is concrete evidence. Although it does sound like we have a very good eye witness account.
I've been on a flight (as pax) where the captain used his discretion and did not apply sensible wake separation for T/O. We ended up with approx 15 degrees right wing down followed immediately by approx 25 degrees left wing down, this all happened just after rotation. Not pleasant at all!