Ok, so when team Voltron find Blue in s1e1 she flies around in broad daylight in the line of sight of the Garrison, and it’s the day after they rescue Shiro so the Garrison probably wasn’t still on lock down at this point.
As a fully operational school, surely someone apart from Iverson and his off-sider saw the giant robot lion flying around less than a kilometre from the main building?
I have this headcanon that Pidge somehow connects the ship to the internet, and as Keith is checking in on all his favourite conspiracy theory boards, he sees a new thread linking the ‘mysterious flying shape in the desert’ with some cave paintings found near a giant hole in millennia-old rock and the disappearance of three Galaxy Garrison students.
The piece de resistance is some really grainy footage of Blue some student shot on their phone.
Keith: Pidge, come look at this
Pidge, from over his shoulder: Keith… omg… we’re cryptids
Keith, tearing up: I knew we could do it