Do you ever receive PDFs from clients and coworkers that are filled only with Sticky Notes and highlights? Perhaps they only have Adobe Reader and those are the only tools they have available. (Here's how to fix that: Saving PDFs for Reader Users: the How and Why).
But perhaps they people commenting on your PDFs simply don't know how to use the commenting tools, and so they use them incorrectly and not to their full potential. Save yourselves some frustration, time, and money by learning how to use PDF commenting tools to more clearly communicate your thoughts and reduce redundancy in your commenting.
This video demonstrates best practices for using PDF commenting tools.