Bonusly doesn't allow for giving negative points, or taking away points as a punitive measure. This is an intentional design choice informed by established psychological research into motivation and employee happiness. Taking away Bonusly earnings is a punitive action, and doesn't serve long term goals of developing, supporting, educating, engaging, and empowering employees.
If an employee needs extra coaching, we recommend a 1-on-1 meeting.
For more information about the philosophy that inspired this design decision, check out these two presentations given at the TED conference by thought leaders Dan Pink and Dan Ariely:
Dan Pink: The Puzzle of Motivation
Dan Ariely: What Makes Us Feel Good about Our Work?
P.S. You do have the ability to remove problematic bonuses as an admin.