I want to draw your attention to these two questions:
https://math.stackexchange.com/questions/3000227/definite-integral-of-function-given-constraint
It seems that 4 users underwith the namenames MSc Roberto, Robert PhD, Monsieur_Bobert and Bachelor Bob are accounts that belong to the same person. These names, just like prof Bob, all resemble each other. This is no coincidence. Also now the questions and answers seem very coordinated.
Edit: The links are dead now. I flagged for moderator attention for these questions, and they are already closed have been deleted now.