If the true meaning of Halloween is whatever we make it to be, then it's not a Holiday.
Webster defines Holiday as...."A holiday is a day designated as having special significance for which individuals, a government, or a religious group have deemed that observation is warranted"
So now, we're warranting the observation for different reasons? Then it loses all special significance and meaning. It's not a holiday then.
And this is how I take your logic into Easter. People become uninformed about the reasons to celebrate Easter (ala why people shouldn't celebrate Halloween in the first place, and those who were persuaded into doing it, were probably told they get free candy and get to scare kids), then those people tell their future generations the same story, and next thing you know, 500 years from now, people are celebrating Easter for the bunny, not Jesus.
And why should people change what they don't like? Man up and take the bad with the good. In fact, you can argue that knowing the bad is more progressive then knowing the good. We all have the right to practice sex, because it's so good right? At the same time, if we ignored what could happen (STDs), and take the bliss (orgasm lawlz) then this world wouldn't be all that great now would it? But let's look at another example. The BP oil spill was a huge disaster, because the technicians assumed their land machines could take the underwater pressure, without testing it or taking any precautions. Their obsession with money, and production resulted in businesses being damaged, sea life being killed among various other things.
The moment we stop fueling ourselves with knowledge, and decide to make out things for our own ambition, then we're only harming the world. Can you picture a future where the whole world is celebrating Easter for bunnies? LOL.