Me clicking on "New article" ...

Title:
<span onclick='return 1248 == prompt('When the construction of the Cologne Cathedral started?');">Click me to open the treasure</span>

Text:
<span onmouseover="alert('No?');" style="width:100%;height:500px;">It's ok that every editor can insert arbitrary HTML?</span>

Don't worry, it's a dev server but still bad to see