How can I delete images uploaded to TinyGrab?
According to the TinyGrab FAQ:
Q. How can I delete a grab from the TinyGrab server?
Visit the TinyGrab online control panel at http://tinygrab.com/go/panel to delete an image that you've uploaded to TinyGrab. This is a Premium service only. Only under special / certain circumstances will we respond to support requests to delete images from our service. Free TinyGrab accounts are intended as a trial and not to be used as a replacement to TinyGrab Premium.
You can submit a support ticket requesting them to remove a specific screenshot, but they will only do so under special circumstances. I've done this before, and they removed it pretty quickly.