Cellphone MANIA!!!

I teach 5th grade, and I run into such problems with CELLPHONES!! I teach 10 and 11 year olds and these kids are over run with cellphones!! I have had problems with kids at school and cellphone ranging from such things as pornography to death threats!! All on my student's cellphones! Let me reiterate one more time, I TEACH 5th GRADERS!!! Does this not seem a little much to be giving a 10 year old a cellphone and unlimited texting and just think they are going to know how to handle everything that comes their way. This is the new aspect of parenting that parents are forgetting! You have to explicitly teach your kids cellphone "rights and wrongs" Am I the only one who thinks it is plain CRAZY to give a 5th grader their own cellphone!?! Vent with me if you will.....