FWIW, the sentiment of the A&M fan base is against this shirt and the AD's comment (at least, against some moron from the athletic department tweeting it).
From the
You have to be kidding.... thread at TexAgs:
The stupidity of the situation aside, why does any of this bother you? You got the crystal football last year and two more in the three years before that. It's just off-season smack talk, even if the AD said it to warm-up some boosters.
I remember seeing a few Alabama fans wearing "You're out of your league" shirts directed at A&M. I remember thinking, "Ouch" when I saw them. Fortunately for us, we played out of our minds.
You do it. We do it. It's part of what makes college football fun, IMO. Personally, I'd rather poke LSU than Bama (it's also marginally safer).