A follow-up from this question.
I've noticed that many spam suggested edits have edit summaries that contain an email address (examples: [1][1] [2][2] [3][3] [4][4] [5][5]). Spambots seem to be treating the edit summary field as if it were the email field in a blog post comment form. It would be great if we took advantage of this to block these spam suggested edits.