As noted above, a lot of it depends on where you are. When I grew up, the alternative was to go to the Church and participate in games there. Actually, I was thinking just the other day of it, and how they used to have "healthy alternatives" as well, such as a bobbing for apples game. I began wondering if anyone does bobbing for apples anymore (it's been over 20 years since I attended one of these events at the Church), or if there are sanitation concerns due to all the shared saliva in the water.
However, my niece's schools still do Halloween parties, so there's not enough of a Religious Right presence to try and remove that from the schools (similarly, my high school's sex education was a lot more informative in regards to the varieties of birth control available, so it could be I was just in a good area for that).
To me personally, people celebrate Halloween the same way they celebrate Christmas: completely ignorant to the original religious purposes and implications (this goes in regards to the Christian meaning and the original Pagan festival that was hijacked). If I recall, the entire purpose of costumes was to also try and frighten away the demons, so the logic of opening oneself to possession is ignorant of the original holiday's traditions.
If anything, Halloween these days has evolved into a holiday of Cosplay and Fandom, candy, sexualization, and Horror Film Appreciation Month.