If your 4 year old daughter comes up to you and says, "Mommy, can we get a scratch ticket," you have failed as a parent*. Seriously, to hear those words come out of someone who doesn't know all the colors of a rainbow infuriates me. Some kids know the tickets by name. Some kids cry when the parents say no (the damage has been done).
Don't buy scratch tickets around your kids. Don't buy them to "shut them up," because that will make them assume they can get anything by misbehaving.
Learn to be proper parents and smarten up.
(*Does not apply to grandparents, who are supposed to spoil their grandkids.)