Also, their EULA that you agree to when you sign up still states:
You agree not to engage in unacceptable use of any Services, which includes, without limitation, use of the Services to: (i) disseminate or transmit unsolicited messages, chain letters or unsolicited commercial email; (ii) disseminate or transmit any material that, to a reasonable person may be abusive, obscene, pornographic, defamatory, harassing, grossly offensive, vulgar, threatening or malicious;
cheers,
Luke