What are the usual methods used for collecting email information from a corporate website, and
What are the usual ways one can undertake to protect that data i.e. to protect its users/emails from receiving spam etc. etc.?*
Basically, what I'm asking is: When you have a website or you maintain a website, onto which, due to the nature of business, individuals have to have displayed emails "in plain sight", what are the usual methods (apart from active ones, such as spam filters) one can employ so that ... whoever those people are ... cannot collect email data, and use it for all kinds of spam & time wasting activities?