Mature reaction, however - I personally don't find it that hard of an XP-boosting matter in this video.
If a covops loses his disguise when engaging a battle, I personally find it normal that the covops is checking for another new disguise (even if it's not his own kill).

When the covops is deliberately removing his disguise and hops from one uniform to another, that's another matter

I didn't see the whole demo, though (I did see the full video presented here, but I personally don't find it that "xp-boosting" ).