Use of email addresses on web pages

Email addresses used on web pages are subject to screen scraping by spammers and putting that address on spam email lists. We should avoid this and not give them the opportunity. The way to avoid this is to use contact forms on the web. Currently volunteers is a registered user and you can use http://new.nynjtc.net/user/41/contact to put up the form. What other internal contacts should I make registered users?