Hi - I would suggest that you update your member profiles with your email addresses and subsequently remove them from these posts.
You can simply point the user to your email address in the profile. There is an edit button at the end of the post.
In the world wide inter-web there are web-crawlers, automated programs that search each page of a web site, for the sole purpose of collecting valid email addresses. At the low end of the spectrum this is used to send spam email, and the malevolent end of the spectrum it is used for spear phishing, which is targeted emails used to steal log in credentials. For example you could get a very real looking email from Citi-Bank asking you to check on some suspicious transactions and they kindly post a link, you log into the link, which captures your credentials then sends you off to the real site - because you successfully logged onto the real site you don't even realize you have been pawned. Substitute Citi-Bank for Walgreens, Facebook or a gazillion other sites you might be a member of - the scam is the same - get your credentials.
Those captured credentials are then used to hit 1000 other sites - as people tend to use their same email address and password for everything.
If they get into an account like FaceBook or Office 365 they start sending emails to people they find in your address book. Your buddy, your aged mother, etc
These recipients are then even more likely to click on something that came from you (a trusted source) and the process is repeated. If they get into Drop Box, One Drive, Google Drive it is possible that your PC having kindly sync'ed everything includes a PDF of your Tax Return or other files that might have your social security number and now the real fun starts with complete identity theft.