Good idea to be cautious. Some years ago my son got it badly wrong, using a boarding school computer whilst attempting to pass on a cancer charity appeal letter to his chums around the world. He managed to clog up and bring down the local education authority's network with "spam", before the word was coined in that sense. Somehow his email was going around and around to everyone on the network.
He got banned from using any school computer for the rest of the term, which was a nightmare because he couldn't do his school work.
