Two things:
1) Yes, he was suspended in 2012, but it was for targeting, an in-game play, not an extra-curricular. Players are suspended all the time for that now. It's not typically intentional, so I don't think it compares to Day's prior suspension, which was for the exact same thing he did against LSU.
2) I did say last week that Elston is the type of player to play a bit on the dirty side. I hadn't seen it from him really since 2012 though (and I'm not talking about the play he was suspended for, which wasn't dirty, just a touch too high of a hit trying to break up a pass).
The things Elston has in his favor are: 1) He hasn't been suspended for post-play activity before. 2) It was ONE incident post-play, not 3, and I don't think it's as clearly blatant, nor as dangerous as what Day did. A 180 pound guy kicking at someone is not nearly as dangerous as a 300 pound guy bringing all his weight down on a player on the ground.
That said, I could see the SEC suspending him, but based on the scale of the Day suspension, anything more than half a game would be too much. If they do, I wouldn't have a problem with it, because like I said, I know Elston's history, so I don't doubt that he may have been deliberately making a kick, and if they believe it was deliberate, then yea, sit him for the first half against A&M.