The smile she wears seems unnatural on this man's face, and it quickly fades. "Prisoners shouldn't talk," she reminded him, wrenching his arms behind his back and into a pair of cuffs. He shouldn't have a problem getting out, but they did add a certain vulnerability to him.
"I trust you won't be holding any of this against me?" she asked, before jamming a needle into his neck. The mark it left would be enough to convince them his powers were dampened for the moment without resorting to one of those hideous collars.
When they reached the front gate they received rather amusing stares, and Raven shot all whithering looks, explaining that 'no, they weren't going to just announce that they were bringing in Magneto, so that he could be rescued by his acolytes' and 'yes, he's been dampened, and if you question me again your family won't remember you to miss you'.
The gates had been opened, and simple as that, they were shown through to the Maximum Security area for processing.