I remember in school when Thursdays was "Throw up" day. Anyone else have that? No? Oh, ok. Sorry. Anyway, now for some links!
Don't know what a subtweet is? Find out here for a crash course.
As for coaches, this is mostly just another way of cracking down on their way of singling out a player he wants to go see. Course how this is going to be enforceable is interesting. Since a lot of these are going to be up to "self-reporting" am curious if there is going to be input from outside sources about whether or not a tweet was a full-fledged subtweet.