What do you do when a friends kid is getting on your nerves?

[changednameforthis]

As its happening to me right now and im not sure what to do.
Completely trashes the place without actually playing with anything, hes 5, emptys boxes and tips out but does nothign with the contents, just moves on to the next stuff.
Roots through drawers looking for things without a thought to whether he should be or not.
On way out the door always seems to have something of my kids to borrow like we are a lending library.
When given juice/crisps/food/pressie never says Thanks, always moans and wants more or different colour/size/packet.
What can I do to minimise the irritation.
Have started to rearrange my house so things are less accessable but he will pull up a stool to reach etc.

flashingnose, I suppose my oldest son was a like this for a while - though not every single box and drawer at other people's houses. That is on the extreme side. I don't get the impression changenames's problem guest is that extreme, though, irritating though it is.

I assume all visiting toddlers are tippers, so then I can be pleasantly surprised when some of them are not.

I can see what you are getting at, though, and in a 5 year old this would begin to annoy me.

As for not playing with stuff once it is tipped out, yes, this is more annoying than if they had played with stuff, but the result(mess!)is the same whether they play or not.