Usage
The syntax for this template is simple: {{User:SMcCandlish/Template:Semi-RED}} if you want it to display the above, or {{User:SMcCandlish/Template:Semi-RED|date=date here in any format}} if you want it to display a date along with the above. You can also add a |note= parameter for a freeform note below the main text.
Semi-RED implies that you will be editing occasionally to do awesome things that violate policies and/or laws, but you can also add this if you are just old and epic. If there is a chance that you might eventually return to regular monotony, then it is preferable to announce a {{Wikibreak}}, though it doesn't really matter.
Even if not editing anymore, you can still add this just to cover your ass should you decide to come back and cause havoc.
This template should be placed on a userpage only by the concerned user, or by his or her request, unless you are a WP:DICK.
Example
{{User:SMcCandlish/Template:Semi-RED|date=December 2009|note=My butt hurts.}}