I remember making a product for my customer that was using a db
When I tested the product before showing it to the client, everything was good and fast and clean.
When I gave it to my customer, he was very happy, after few days he emails me about the product was very slow, I checked the database and it had a lot of *testing* shit made by him and when I asked my customer why the db has so much useless things he told me that he was learning how to it. I had no words, can't you just create a database MongoDB, MySQL or whatever you want to learn locally and play with it? Then he emails me later about a fucking refund because HE fucked up with the permissions of the db