This guy knows, I've had that play used on me before I was RP aware. While I was breaking up with her: "But I told you about X before we even started dating!!1" Protip: Breaking up with her had little, if anything, to do with X on its own, but it gave her something to latch onto to paint herself as the innocent victim.
Sarcasm is often thinly veiled anger. Especially in the dating profile context. Any time you see the word "sarcasm/sarcastic", mentally replace it with "anger/angry" and you'll find it to be more accurate and clear.