I don't think there is enough saying about this. Most inmersion breaking -and- gameplay inconvenience since I started playing.
And is not Only a map problem. It is a problem on FSS scan (a big one sometimes), nav panel for new players until they know they can filter that #$@ useless garbg.
There has been practically never a reason for me to Show Filter the Fleet carriers on the nav panel... If one time I need to see where a FC is, I'll let them know. Or even better, I'll use a third party app to find it.
Tho, I reckon some times, Exploring and jumping in a random system and see one or two fleet carriers is always the sign of "Ok, I found the place..." But of course breaks the awe... "Oh, I'll follow that Ram Tah mission, sounds awesome" -> Finds fleet carriers orbiting every guardian ruin "ok, lots of people grinding them daily...I feel special"
Worst part is that probably there is a reason they'll left the system like that; for new players: Show that the game is alive with lots of players and they can become a miner-grinder to buy his own FC too.