A particular answer of mine, Coin Betting Problem, is being regularly edited as vandalism. I can only assume this particular question and answer are somehow magnets for spam due to the "betting" word. It gets spammy vandalism seemingly every other month or so, and it's just annoying.
(The vandalism is always rejected - the review process is working.)
By the way, is this common - are the spammy edits concentrated on a few questions/answers? How common is this?
Just for completeness, the most recent edit removed all my content and replaced it with the text:
Thank you for share! [url=... spam URL ...]louboutin shoes on sale[/url]
This is the usual form of the edit: complete deletion of the content, then replacement with a trivial spam message.