Squash Historians on Players Noted for Unsportsmanlike Conduct

Asal, Zakaria, who else? I'm wondering, historically, who else in the history of squash has been known for unsportsmanlike conduct, specifically blocking/tripping. I feel like the El Shorbagys early on in their careers, especially Mohamad...who else? This is for an article I'm writing, any input would be greatly appreciated!