I suspect that (1) there's probably more than one Jackie in the Croydon area, and (2) her repeated use of another poster's first name might dampen any claim she has that her anonymity has been unfairly compromised.
Unfortunately, the bottom line (which read "Share the wealth, pigs") is omitted from that photo.
Generous lot, Palace fans, it's well documented that they enjoy sharing their wealth with footballers. Usually in the direction of said player's head, whilst celebrating a goal or taking a corner.