Conversely, forms that are inappropriately formal may be seen as impolitely snobbish or distant.
In our case we decided that the risk to our elder son's mental health if, to put it impolitely, he had two nutty siblings, was high.
I apologise for attempting to make my point so impolitely.
She ran all the way from the station so she wasn't impolitely late.
I apologise in advance for having so impolitely poked fun at all these good people.