...because they're not sufficiently house-trained
I'm sick of other people's children pooing in my toilet and then not flushing. Yesterday evening I was yet again greeted with a toilet filled almost to the brim with shitty bog roll, and then a completely smeared bowl [bleurgh] because the poo had sat there unflushed for hours.
Can't they hold on until they're home? (they're all 9, dd is 8)
I'm really fed up with it, at the moment (and I know IABU) I feel like telling her she can't have anyone over to play.