they could deny you entry next time, and you'd have to buy an expensive plane ticket and lose your Airbnb, possibly thousands of dollars. and not let you re-enter for X time.
@Darksider415 did you read that other thread?? they are electronically tracking abuse of tourist visas now, and there is some sort of algorithm. be careful with recommending overstaying and border-runs. new people might not know things have changed.