My mum takes the kids once in a while and TBH I'm not keen on it.
They smoke, they have a stable door in the kitchen that they smoke at but you still reek when you leave.
They go to bed at 7pm here, but are still up watching films at 10 at hers!
She has no concept of appropriatness when it comes to said films. Shes let them watch iron man2 and the new Alice in wonderland (they freaked me out!)
She has been getting them more kiddy films but I like to check them out first.
But the thing that winds me up most is the sweets/food.
She collects them from school with something (like a double decker!!) then they eat that and she usually has crisps waiting in the car and from the second they get in the house they have what they want and are never told no.
When I am there I limit it, but I can't control what she gives them when I'm not.
Last time I rang when I woke up at 8am and she said 'DS1 let grandad open your quavers'
I said WHY are they having quavers at 8am??
she said 'oh they've been up since 6:30 and had 2 bowls of coco pops so its ok'
They come home absolutly buzzing and fighting.
I don't want to NOT let them go because they do enjoy it (I don't enjoy them being there really, I'd prefer to have them home) but I've told her time and time again to cut down and she never does.
My gran is the same but we don't leave the kids there so we say 'thanks' for the big bag of crap sweets she gives them and we usually bin it (its all awful stuff)
BTW i'm not a 'foodie' we consume out fair share of treaty things in this house but there its just constant and excessive to the extreme!