I have been selling my bitcoins earned from signature campaigns for more than a year now and never faced any problems with it. I sell them to local merchants in Localbitcoins.com and get the funds in my desired bank account and then i cash them out on ATM. There are no regulations regarding Bitcoin in my country and maybe that is the reason why i was never bothered by the bank or any authorities, but someone might have to answer a few questions if there are regulations implemented on Bitcoin in their country.