what do you think about adding another optional attribute to the link macro to specify who is allowed to see the link? it would be cool to have links for contributors or admins only while regular users see the link text or nothing.

shouldn't be that hard to implement (although nothing is as simple as it seems to be ;-) any syntax-proposals?

i consider this proposal as a good idea, too, but also see the caching restraint. what to do about it, then?

ad syntax: "for" sounds ok although a name describing the parameter's function would be better ("allow"?).

"alt" is html slang and robert did avoid using such names throughout the whole macro collection he built. i don't have a good suggestion but i think it should be something like "denytext", "camouflage" or simply "message"...