One good reason to encourage the use of kitchen paper instead of tissue - it doesn't break up in the washer!! Don't listen to the kids protests that it hurts their noses, if they emptied their pockets (and turned their clothes the right way round, pulled their sleeves out properly, undid their buttons, pulled their socks out and took their pants out of their jeans/trousers) you wouldn't impose such draconian measures
Better still, go back to the early childhood commonsense methods of wiping your nose on your sleeve and coughing over the lunch. No more laundry disasters - apart from of course when you wash a £20 note, your 02 tickets, and your rail season ticket all in one expensive load.