1. In what way do devotees of Lord Kṛṣṇa offer respect to Lord Śiva?
It is said, vaiṣṇavānāṁ yathā śambhuḥ: Lord Śiva is the best of all devotees. Therefore all devotees of Lord Kṛṣṇa are also devotees of Lord Śiva. In Vṛndāvana there is Lord Śiva's temple called Gopīśvara. The gopīs used to worship not only Lord Śiva but Kātyāyanī, or Durgā, as well, but their aim was to attain the favor of Lord Kṛṣṇa. A devotee of Lord Kṛṣṇa does not disrespect Lord Śiva, but worships Lord Śiva as the most exalted devotee of Lord Kṛṣṇa. Consequently whenever a devotee worships Lord Śiva, he prays to Lord Śiva to achieve the favor of Kṛṣṇa, and he does not request material profit. In Bhagavad-gītā (7.20) it is said that generally people worship demigods for some material profit. Kāmais tais tair hṛta jṣānāḥ. Driven by material lust, they worship demigods, but a devotee never does so, for he is never driven by material lust. That is the difference between a devotee's respect for Lord Śiva and an asura's respect for him. The asura worships Lord Śiva, takes some benediction from him, misuses the benediction and ultimately is killed by the Supreme Personality of Godhead, who awards him liberation.
-Śrīmad-Bhāgavatam 4.24.30 Purport
2. What is the relationship between Lord Śiva and the ghosts?
Lord Śiva, or Rudra, is the king of the ghosts. Ghostly characters worship Lord Śiva to be gradually guided toward a path of self-realization. Māyāvādī philosophers are mostly worshipers of Lord Śiva, and Śrīpāda Śaṅkarācārya is considered to be the incarnation of Lord Śiva for preaching godlessness to the Māyāvādī philosophers. Ghosts are bereft of a physical body because of their grievously sinful acts, such as suicide. The last resort of the ghostly characters in human society is to take shelter of suicide, either material or spiritual. Material suicide causes loss of the physical body, and spiritual suicide causes loss of the individual identity. Māyāvādī philosophers desire to lose their individuality and merge into the impersonal spiritual brahmajyoti existence. Lord Śiva, being very kind to the ghosts, sees that although they are condemned, they get physical bodies. He places them into the wombs of women who indulge in sexual intercourse regardless of the restrictions on time and circumstance.
-Śrīmad-Bhāgavatam 3.14.24 Purport
Today in Hindu society, unmarried girls are still taught to worship Lord Śiva with the idea that they may get husbands like him. Lord Śiva is the ideal husband, not in the sense of riches or sense gratification, but because he is the greatest of all devotees. Vaiṣṇavānāṁ yathā śambhuḥ: Śambhu, or Lord Śiva, is the ideal Vaiṣṇava. He constantly meditates upon Lord Rāma and chants Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. Lord Śiva has a Vaiṣṇava sampradāya, which is called the Viṣṇu Svāmī-sampradāya. Unmarried girls worship Lord Śiva so that they can expect a husband who is as good a Vaiṣṇava as he. The girls are not taught to select a husband who is very rich or very opulent for material sense gratification; rather, if a girl is fortunate enough to get a husband as good as Lord Śiva in devotional service, then her life becomes perfect. The wife is dependent on the husband, and if the husband is a Vaiṣṇava, then naturally she shares the devotional service of the husband because she renders him service.
-Śrīmad-Bhāgavatam 3.23.1 Purport
4. Why does Lord Śiva have snakes all over his body?
In order to get release from the false ego, one has to worship Saṅkarṣaṇa. Saṅkarṣaṇa is also worshiped through Lord Śiva; the snakes which cover the body of Lord Śiva are representations of Saṅkarṣaṇa, and Lord Śiva is always absorbed in meditation upon Saṅkarṣaṇa.
5. What is the position of Lord Śiva ?
In the Vāmana Purāṇa it is said that the same Viṣṇu expands Himself as Brahmā and Śiva to direct the different qualities.
Maheśvara, or Lord Śiva, is not an ordinary living being, nor is he equal to Lord Viṣṇu. Effectively comparing Lord Viṣṇu and Lord Śiva, the Brahma-saṁhitā says that Viṣṇu is like milk, whereas Śiva is like curd. Curd is nothing like milk, but nevertheless it is milk also.
-Śrī Caitanya-caritāmṛta Ādi 5.104-105 Purport