I think the use of the "." is desirable after all abbreviations.

I don't. (just weighing in with my two cents' worth)

Didn't I see it here - the article, I think it was by Steve Martin, that was carefully constructed so as to use only one full stop in the punctuation of the entire piece? the premise being that the full stop is becoming an endangered species and that publishers of all kinds of printed materials are rationing its use? Just as this post of mine uses only one full stop that isn't recycled, in case you hadn't noticed!

Save the full stop! (or period, some calls it)