Uh not really, since many people don't even give comms in the first place and they can just choose not to give that person any as well.
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Should be obvious that this thread is about people that give commendations.
If the run went just moderatly well, no one stood out good or bad and you see the comm window only has one player (again I am assuming here you look at the window...), why would you not give it.
Y'know, even if people "abuse" this, they get a title, a hat, a barding, and a mount. And some points. Faster. It's not exactly game-breaking.
It's also already decided, so kind of moot.