A_267 - It is not a crime and is not prohibited to spit, blow or lick a computer monitor. The gesture is not to be considered a lack of respect towards those who produced the device. That's not to say it can't even be made to play a game. It is useful because it is still important on a psychological level that this type of experience is also carried out, and is not harmful to the device. Conceptually it can also be done with mirrors or windows glasses ... (at your home)