The Mutant Phenominna - Explination...
If mutants were unknown, and largely kept secrete. Then why did some mutants openly use there powers in x-men origins wolverine...
Lets just look at this for a second...
When young james howlett first revealed he had bone claws, his mother didnt know what he was. Creed did because he is of the same "Mutant" species. Elizabeth simply wrote off her son because she didnt understand what he was or that he was a mutant.
During the wars, i would imagine that mutant abilities were kept a secrete and used as a weapon against the enemies. So its a bit like, what they didnt tell you that really happend so still being covered up.
During Team-X - there first mission. Zero killed anyone who saw his ability, Blob blew up the tank with the guy inside, Creed crawlled up the side of a building in the darkness easly unnoticed. Bolt makes the elevator move but its hard to tell what his actual power is, and wade well the way he was swinging the blades you would of just thought he was talented not a mutant. The only true indication of a mutant presence was when Wraith teleported to the side of that guy... Now being that he is a diamond dealer and didnt want to cause fuss, plus he would then have to explain the deaths of all his men without acting like an insain person well would you admit to mutant...
Then we go to lagos were we see the remote villiage get killed, but look around there just soldiers with guns and knives... How could you tell the are mutants. none of them displayed any of there powers.
Silver Fox never really displayers her powers because its persusaion, so they would never know directly they were being controlled.
Bolt - was in a circus and his ability was played off as a cheap trick.
Creed amd Logan figth in a bar revealing his bone claws - the only time i figure the public would see a mutation but it was a small town and chances are that the small town would write it off as a phenomina. you know UFO's, sasquash...LOL and the occassional ghost siting.
Blob got fat, and wraith well only seemed comfortable to teleport when there was nobody but Blob and Logan in that boxing arena...
Gambit - was flamboiantly using his ability, but did you see how he was doing it, in plain sight. How many TV Magicians or nightclub hired entertainers done simuler things to shock and amaze you. The reason that customers didnt think twice about it is probably because he either works in the bar and they thought it was paid entertaiment.
However when Gambit goes to fight with Logan throwing him throw a wall, well if that happend to you, wouldnt you think it might of been staged a little, i mean you go to those universal studio rides where the used to do disaster rides and everything seems fine until they stage a flood or something, remember they were in a bar, with entertainment, he was entertaining customers probably thought it was part of the act.
Cyclops at school hid his power, with great difficulty - it is only revealed when he is being hunted by creed and even then nobody was around to explain the burns so the school would simply explain it was a fire.
then we move to strykers island were they all know about mutants because they have been experimenting on them.
So the way i see it, unless you were a mutant who knew other mutants, the Mutant Phenominia was still left pretty much unknown up to x1