Actually spam classifiers are not easy at all. First, the data is very unbalanced. Second, you would need to retrain the model often. So you would need to und

Actually spam classifiers are not easy at all. First, the data is very unbalanced. Second, you would need to retrain the model often. So you would need to understand statistical methods for comparing text level/word level distributions. This is not a college-level stat. Third, you would need deep knowledge in NLP, feature engineering and algorithm selection.