we use egg boxes, chances of catching anything from them is minuscule. Most are salmonella free these days which was the problem... we do check allergies and not use if an egg allergy etc... toilet rolls we use only from a known source...eg staff who know how they have been handled...but again have never had a problem with these .... if worried use kitchen rolls. but who is to say how theres are handled either.

but then you could ban all boxes from cereals too - a possible contamination with nuts, etc etc

Think myself this is one of those myths which had become a bit of folklore....

Did have a site which said it was Ok to use them in schools, and microwaving does nothing but they have removed the pages!