Rule Violation Reporting
If you want to tell anything to somebody when currently you are writing Rule Violation Report, press Ctrl+A (to select all text), then Ctrl+C (to copy selected text to the clipboard). Now you can cancel report dialog window and type anything in any channel to send. After that, reopen Rule Violation Report by Ctrl+R and press Ctrl+V (to paste text from the clipboard) and continue with the report normally.
After sending report, you probably noticed that the text field of newly opened Rule Violation Report channel is inactive and you cannot say anything or cast spells or even use hotkeys. To do this, simply switch to another channel (eg. Default) and send message or use hotkey. Rule Violation Report channel has not to be visible in channel tabs to be still active.
See article about Console to get more informations.