This, and the fact if they see bruv119 for example they would either run away or a mass group of people may be hunting him down
For quite a while in Fighter Ace, not only did we know who we were engaging, but we also had a good idea how many kills said pilot had "under his belt" because for every 5 kills the "ace" achieved he would carry around a * following his name... So Joach1m nailed it.... it would be a "hunt fest" that basically necessitated the "Ace" would have to have several guys covering his six. Just imagine seeing..... DrBone**** (basically meaning he had achieved 20+ kills without being shot down) and how the enemy's eyes would light up with visions of being the one to knock down such a nemesis.
In WW2 they had player names at 6k in bright red 
This actually does have historical similarities when you think of Erich Hartmann's 109's Black Tulip paint job or Manfred Von Richthofen's Red Dr1 letting the enemy know they were about to engage in battle... provided they saw them coming at all.
In the case of Hartmann, both of Joach1m's arguments manifested themselves. Once it became common knowledge who was piloting the 109 with the Black Tulip nose... the pace of Hartmann's kills slowed and did not pick back up until he reverted back to a more generic paint job. While the rank and file soviet fighter pilot avoided combat with who they knew to be Hartmann, the Guards Fighter Regiment (soviet top guns) were dispatched to rid the skies of the dreaded Black Tulip nosed 109 and very nearly succeeded on one particular occasion.

Nishi