Online enquiry form

A friendly online enquiry form ask for only 3 essential information

a) Your name
b) Your e-mail or contact number
c) A text box for you to type your enquiry

Most large organisations have an enquiry form that ask for non-essential information (many of which are mandatory) and ask the customer to select the type of enquiry from a long drop down list. They seem to enjoy making life difficult for their customers.

Of course, they want to collect customer data, but do they have to alienate their customers?