Personally, I don't really mind what measuring units are used, provided the recipes are reasonably clearly written and unambiguous.
As Darth says, establishing a set of standards is one thing, but expecting a multitude of people (from around the world) to comply with the standards is quite another.
I therefore think we need to be flexible (and not too anal) about it.....so....here's a suggestion:
Allow members to post recipes, using any format and measures they damn well please (or not!), as is currently the case.....but....
....before a recipe is "formally accepted" to a "formal recipe section", a moderator (?) ensures that the recipe conforms to certain basic standards (e.g. is reasonably clearly written and unambigous)?
Perhaps this would necessitate a "two tier" recipe section (i.e. an "informal" section and a "formal" section)?
A key requirement should be that the weights and volumes are clearly, and unambiguously, defined (whatever measuring units are chosen)
The aim should simply to be to ensure that members can replicate the recipe?
What do you think?