Would you message a fake account if you know them?

A guy I know from college has been using a fake account to follow me and watch my stories. There were a few hints that it was him such as his message on my anonymous question page in which he implied that my pictures were of him. He liked a picture of mine and then removed the like months later. I thought of messaging him just for fun but I don't know if it is a good idea or not
Would you message a fake account if you know them?
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