Cons:

1. Rahu in 12 might create problems on material front. Bhava 12 is the house of moksha (letting go); Rahu wants to leap forward and engage in materialistic activities, but doesn't have the right resources. Often leads to joblessness, job dissatisfaction, unstable job situation, and financial crunch.
2. Rahu plays with the mind. Often enters as a surreptitious poseur and shows mirages and illusions. It leads people to engage in illegal and immoral activities, insult other people, and become an atheist. It will make you a substance addict.
3. Causes mental issues, including cognitive disorders, schizophrenia, narcissistic personality disorder, anti social disorder, bipolar/borderline disorder, and mental tension.