2) Clicking or moving objects without paying full attention to what you are moving or where you are moving them.
User - "I accidentally deleted an important file from the network drive."
Support - "Did you receive a warning prompt?"
User - "I did, but I clicked yes to it by mistake."
Example of 2.
The February email archive spontaneously moves into the January email archive. No one knows how it got there, must have been clickitis.