Tried to include it (html) in an email. It worked under "preview" in Outlook Express 6. Can still see it in my copy after sending it. Question is whether the recipient actually received it & viewed it okay - don't know.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .