This is called bearding and used to be prevalent with polyester battings "in the old days" (may still be, I don't use poly any more).
I read the same 'right side/wrong side' thing here, but I feel that if it were truly a "worry about this" problem it would be noted on the batting packaging, like quilting distance apart information is, and it would be appearing in articles in all sorts of quilting magazines. Anyone seen articles on this in multiple publications? Me either.
Jan in VA (who really doesn't want or need another "got to" to worry about
)