I've long wanted this to work, like Ms Grace and I've spent the last half hour looking at all my settings and can't see anything that needs to be fixed, but I did find that using a colon with words then another colon is supposed to give the desired result, for instance, putting the word mad between colons results in
and thumbdown between colons results in
and shock between colons results in
but it doesn't show until you post or preview the posting in advanced.