If your account was frozen because of listing naughty things, I think you will find that your account has been frozen in case there were more naughty things and an influx of cases may be about to come in.

PayPal is just restricting your money for that period to allow for any claims that may be made in the interim to ensure that you have enough money ion there should there be a huge amount of claims needing refunds.

Are you sure that it weon't allow people to pay into your account though? It does seem weird that they would stop you receiving money, but I get why they are stopping you from withdrawing it.