The question is this: Why has the prefix un- been typed/printed in italics. Note that the whole word leans to the right, but if you take a look at the original post, you will see that the prefix un- is only sloped to the right.Please note that a link has been added to the original post in the above quote.
Having checked Urban Dictionary and found the following:
bad, originating from the fictional language Newspeak in George Orwell's novel "Nineteen Eighty-Four". Newspeak is closely based on English but has a greatly reduced and simplified vocabulary and grammar.
Urban Dictionary: ungood
Additionally, we have some rules here. Others rules have been left since I couldn’t read them well.
Also, I have checked Collins Dictionary.
italic (ɪˈtælɪk )
a style of printing type modelled on this, chiefly used to indicate emphasis, a foreign word, etc
British English: italics Italics are letters which slope to the right. Italics are often used to emphasize a particular word or sentence.
Definition of italics | Collins English Dictionary
Also the wink smiley is an invitation not to take it so seriously.