There is indeed a burden that comes with being a registered sex offender. They have to report employment and residence addresses to police, as well as keep police apprised of any travel that would take them away from home for a week or more. They’re also subject to random police checks, and if they’re caught not abiding by the rules, they can face up to two years in jail. And while the registry isn’t public, and isn’t even accessible by most police in most situations, it does still have privacy implications.