I know may be joking, but no bird is vicious (and only hybrids are bastards)
In Europe Mute Swan is an indigenous, fully protected species, and they are never attacking people (but rather defending their offspring), and they are not more "aggressive" than numerous other highly territorial such as Ruby-crowned Kinglet and American Coot.
I'm aware of the fact that on your continent Mute Swan is an invasive species (just as Mink is here), so in that light I may better understand your blatant "swanism"
But I'm simply sick and tired of seeing animals bestowed with human traits:eek!:
Sorry for the rant, back to reading about yet another pair plus young of Red Kite being killed by poison, because they're looked upon as "evil or destructive" birds taking the occasional Pheasant's chick (an invasive species here, if there ever was one....)
Peter