According to Mujahid (a student of Ibn `Abbas), jinn fear humans just as we fear them, and more. They also envy humans and can give us the evil eye, according to the hadith of the Prophet (saws). The Prophet (saws) also sought refuge in the envious look of humans and jinn.

The Jinn Companion to Human Beings (Qareen)

The Prophet (saws) said:

There is none amongst you with whom is not an attache from amongst the jinn (devil). They (the Companions) said: Allah’s Messenger, with you too? Thereupon he said: Yes, but Allah helps me against him and so I am safe from his hand and he does not command me but for good.

Offering Sacrifices to the Jinn is categorically forbidden (haram)

Offering sacrifices to the jinn is a form of shirk by consensus of the scholars. It is not allowed to eat of the sacrifice either. The Prophet (saws) said:

Allah has cursed the one who sacrifices to other than Him (Sahih Muslim 1978)

The problem is that people are unaware of how this might happen. A magician might ask someone to sacrifice an animal in order to solve their problem. Such a sacrifice, even if on the surface is for Allah, is considered to be a sacrifice to the jinn.

Seeking Refuge or Help from Jinn is forbidden

Allah is the only One through whom refuge (in the shar`i sense and in matters of the unseen) must be sought. In pre-Islamic times, the Arabs used to seek the protection of the jinn when they were out in the desert or valleys. As before, the fear is not that people may knowingly do this, but they may be guided toward doing something without knowledge like this by ill-intentions sorcerers. The Companion Khaulah bint Hakim narrates a du`a from the Prophet (saws) to seek refuge in Allah.

Similarly, to seek help (isti`anah) from the jinn is unlawful and an act of kufr. Isti`anah is sought only from Allah, as in the verse in Surat Fatiha. Sorcery cannot work without the sorcerer first seeking this kind of help from the jinn.

Do the Jinn live with humans and in their houses?

There are many stories in popular discourse about haunted houses and the like. It is possible that sometimes jinns live in houses and harass their residents, but it is more likely that the more outlandish stories are just that, i.e. stories. The classical scholar Ibn `Aqil narrates in his magnum opus Al-Funun the story of  a house in Baghdad with a reputation of being haunted. Every new owner would be found dead the very next morning after moving in. This continued until a man of the Qur’an moved in. He narrated later than a jinn took the form of a young man and appeared to him from the well of the house. The new owner started teaching this jinn the Qur’an and the two of them conversed. The jinn told him that the other owners had started committing sins inside the house and he had strangled them.

The Muslim should not be scared of houses like these. Regular recitation of the Qur’an and protection using the adhkar and du`as is an effective shield against these matters. See the section on expelling jinn from houses.