Cruel and Unusual Punishment?

Leroy Schad is a 72 year old sex offender. After pleading guilty to trying to have sex with a 9 year old, Schad wanted to avoid jail time so he accepted a deal for five years probation and house arrest.
One catch, Schad has to have signs that say "a sex offender lives here" around his house and "sex offender in this car" on his car.
Schad says the signs are making him a target and putting him in danger.