I didn't see anything about it with a quick glance over the rules, but I saw a user sharing their e-mail address publicly, and removed it, left them a note asking them to use the DM feature to share any personal information, just to prevent them from being bombarded with unwanted e-mails.
When personal info like email addresses, serial numbers, etc are included in posts, I've long been under the impression in some cases that the OP doesn't realise that the forum is a public forum but rather a means of lodging a (private) support request to Vegas support.