Today I have been bullet proofing the Safety Net system of PowerTools. Basically the idea is that every single file, directory or registry removal operation goes through the Safety Net component that verifies that the file/directory/registry key/registry entry that is being removed is not an important system entry.
If it is, if the action originated from the user (e.g. user used the File Tool and attempts to delete a file that PowerTools thinks is critical system file) the Safety Net shows a confirmation to make sure the user knows what he is doing. If, however, the action did not originate from the user the Safety Net automatically denies the removal procedure and shows an "internal error" message. This should never happen.
Before it was possible, at least in theory, to bypass the Safety Net because it was only supported by the Delete buttons of the product. After this update it's impossible to bypass it.