It can be included but it is typically not, "digit" on the other hand refers to fingers (including thumb) and toes. Although since it also applies to toes, which could influence the statement, I don't see any problem calling it a finger in this scenario.
Poll: For my next spooking animation that you get by hovering over thumbs or whatever random thing I choose, should I add in random insulting messages? Maybe make some function to generate random animations.