It could happen. Teenage sociopaths exist. But they're very, very rare. You're falling victim to the Columbine fallacy here. TV news makes a poor reference for risk management.
But yes: if this exploit is easy, eventually some diabetic is going to be murdered through it. Far more diabetics will kill themselves via poor diet choices, however.
And even the Columbine sociopaths were targeting people they knew, rather than random strangers. Random murderers targeting random strangers are even rarer.
But yes: if this exploit is easy, eventually some diabetic is going to be murdered through it. Far more diabetics will kill themselves via poor diet choices, however.