Some just ignore it; others lash back. On occasion they do like Matt Barkley and invite the writer to come see how wrong his evaluation was.
Barkley caught wind of it and took to Reddit to respond:
Easy there Jimmy, you don't know a thing about that route, the defensive coverage, technique of the wide receiver, the route he was actually running, let alone my maximum velocity arm strength.
We can play catch sometime if you want to figure out for yourself how hard I can throw it, just lemme know
You have to give Barkley a little credit here. He does make the mistake of responding to the criticism (giving the writer exactly what he wanted), but otherwise he was completely appropriate--not every guy in the NFL would have been.
JimmyKempski: My schedule is open.
EvanMathis69: Jimmy, I just went potty.The thread goes on to talk about how Kempski can analyze Mathis's potty; funny stuff. Anyway....
Barkley hasn't had many chances to show his talents off in the NFL and the few that he has had were not very complimentary, but all it takes is a quick search on YouTube or Twitter to get an example of how well Barkley can throw: