On contact form, you can make the 'Name' field mandatory.  However, when you look at the form, this field is broken into 3 fields; First, Middle, Last.  If you make the 'Name' field mandatory, only the First name is required. the last name is not.  

I reported this to support and they gave me a good work around using a very basic workflow.  However they were a bit hesitant to report this as a feature, nevermind a bug.  Am I off base thinking that if you require the name field on a contact form, that both first and last name would be required?  (Aren't contact first and last name an essential part of any CRM solution?)