holders are not liable to pay until april 21, page-21

Playing devil's advocate here...is it really an obligation for an on-line broker to stick up all the warnings about purchasing these securities? Isn't an on line broker simply a means for a purchaser or seller of securities to conduct a trade at minimal expense? If a buyer or seller of securities was after advice regarding their potential purchase or sale, shouldn't they have gone to a full service broker?

Interested in peoples thoughts on this.