Not to mention all the potential operational problems it can cause. At a previous job a new system was deployed to help the customer service team. I can't reme

Not to mention all the potential operational problems it can cause. At a previous job a new system was deployed to help the customer service team. I can't remember the details, but it was backed by this pretty meaty database so we could collect lots of data for later analysis. The etl processes was delayed for some reason so a couple of people were given 'temporary' access to the production db. Lo and behold, a week later the whole thing mysteriously grinds to a halt as an analyst left some huge query running in the background that locked up all the important tables until an admin can in and kicked them off. Letting people run arbitrary workloads on a system you want to be stable is a bad idea.