You have a friends list, you know. Just add them. Surely you'll get to recognize your guild-friends over your other friends quickly enough.
Which I do indeed have, it's a rather big and unwieldy friends list though, and needs pruning, if only those who left EIC could be, y'know automatically removed from my friends list, like if we belonged to some guild or clan of some kind which kept this list automatically populated, updated, and let me recognise them all quickly when in space.
Why are people saying no to this? The mind boggles.