They are large groups of people who have been told that they can't do "x" or they are not allowed to do "y".
They are told this by groups of people who, for whatever reason, and in whatever way became successful and now spend the majority of their time attempting to maintain that success and in my humble opinion, spend a lot less time on the thing that got them there in the first place.
The problem for these people is inevitably one of pure logic. If one continually tells enough people that they can't do something one is quickly outnumbered by these people and with every person that one tells they can't do something, there becomes a split into categories of those people who won't do something and another category of those who will. A further subset of those who will are those will try and fail and not try again. Then there are those who will try and succeed and support those who were told not to try. Then there are those who will try and fail and try again. The people in the latter category are those to be feared by those in the primary category. The enemy of those who say "We can't do this." is not those who try and fail...The enemy is not the person, it is the will.
So, to those who would tell someone they can't do this or they can't do that, my advice is to tell that person how they can do it, otherwise you awaken a will that will that will lend to your downfall. Since my goal, however, my desire is to see a world forged of that will...forged of that desire, carved by those people who would say "Fuck you!" to those who say that we can't do this, I would say, hey, keep creating enemies...keep suppressing others because the one that rises, the one who dreams big and overcomes the combined efforts of those on top who would tell them otherwise is the person who will be the personification of triumph.
We can't have a tattoo expo...but we are.
We can't have a music festival...but we are.
We can't build a farm.
We can't build a school.
We can't build homes....
We CAN'T DO THIS...
But we are
We are doing the things that so many people said we could not do, because enough people got pissed off at those who would say that this could not be done.
We are a group of the stones that the builder refused...but if you reject enough stones, those stones form a mountain.