putting up contact address in websites?

why many people dont put their contact address in their website? wouldnt it be a good idea to publish this information to gain trust in my clients who are looking to buy from my website?

is there any problems in publishing such information?

 

It would only triple your junk mail.

 

immortality is right about that, particularly add it as text. If you add it as an image it makes it harder to be automatically harvested by a bot.

 

I put email & phone number as images.