Oaksterdam University is not an accredited institution. Meanwhile, attendees — clad in Oaksterdam sweatshirts, tie-dyed T-shirts advertising the marijuana newspaper High Times, and marijuana-leaf tie-clips — dutifully took notes. Maria Luisa Legarra Urquides put herself through what is now Arizona State University by cleaning toilets — and. It was her Southwest-inspired apparel. The Raiders will soon relocate to Las Vegas, but until they do, they’ll continue to be known as…