I see the point you're making, Reba. But I think that A) the challenge for some of these colleges/universities is to get them to see that ASL is, in fact, a language, and B) schools that already offer ASL as part of its language curriculum need "help" in understanding that it does belong in the Foreign Language department. At least, that's how I read the argument (to which I also subscribe) being espoused by some posters.
As you likely already know, this debate in semantics becomes important for some high schools and post-secondary schools when you start looking at foreign language requirements needed to graduate. If schools would accept ASL as a foreign (ie., non-native to the majority of that school's/community's population) language, this would help meet those requirements.
Ultimately, it would be nice if there were consistency nationwide, which is why I suggested "attacking" this on a national level, rather than a regional one.