How would paypal even find out to freeze your account? Do account freezes only happen during disputes, or does paypal actually have a way of knowing when bitcoins are being exchanged?
If you tried to buy Bitcoin from a website, when they went on their crusade you either got your account frozen, or your personal phone and work phone were called for information about what you've been purchasing. There has been anecdotal information throughout the forums that if you purchase bitcoin from somebody, and it eventually gets out they were a bitcoin seller, you may have to deal with telephone calls.