Yup WISY, you can always do that, like you can with a normal post. But with a normal post you can also put the name down, and anyone who's interested can check back and see if what you've quoted means anything different in context, which it sometimes can.

So I'll just stick with scrolling right past unadorned GUESTs, since most of the time they are in fact just trying to stir things up in an unfriendly way, in my experience.