Drug testing is invasive and very ineffective. As American citizens, students are allowed to deny an unlawful seizure of search in the case that the drug tests are randomly testing kids being they don't have a true reason or suspicion to test them. That being said, all students can deny the test meaning the whole concept would be ineffective and whoever is funding the drugs tests are losing money, for they are not finding the results they want to find, or they are finding a number so low it is pointless.