In Italy yes, it's part of trying to emulate the culture --they sweeten as a matter of course, but a less (I draw the line at gulping the shot, getting instantly wired). In a random coffee-house here in California, maybe, because unless it's really dreadful, I'm too cheap to leave it on the table/counter. The kind I'd like to think I routinely make (shameless snigger, chortle, guffaw), no need for any manner of disguise.
For me a latte is another story entirely. From the outset, I treat these as flavored milk-drinks with coffee added.
Cappuccino at Sisteron cafe