Using Bitcoin for other than monetary purpose is not abuse if you are willing to pay the price. (may it be either in fees or in dust)
You can't abuse Bitcoin anyway. Some tried, did not worked so much.
So, if I start accepting fees for it... people can leave toxic waste in your yard? After all... they paid a fee.
Things are not so simple as you make them out to be. One user (drawn from a tiny subset of mostly a dozen people, currently) ... collects a fee then everyone else for all time in the future takes a bandwidth and storage cost.
Fees are a useful mechanism and, at times, an effective tool, but they do not themselves create moral authority or guarantee system survival because they do not and cannot pay the enormous externalities that dominate the system costs and they do not reflect a consensual interaction with all people they might impact.