Re: So...
Might I suggest one of the following.
http://static.adweek.com/adweek.com-prod/wp-content/uploads/sites/2/2016/06/BewareOfSarcasm.jpg
https://pbs.twimg.com/profile_images/591312552669351937/USRF3YMB.jpg
http://refe99.com/wp-content/uploads/2014/09/Life-Love-Quotes-Sarcasm-Because-Beating.jpg
https://ih0.redbubble.net/image.131276572.2426/flat,800x800,075,f.u2.jpg
http://goodquotesword.com/images/92077/z4i_quotes_about_being_s.jpg
Please feel free to add your own.