What do the different religions say about protection from curses and spirits?
In the Baha'i Faith we generally don't believe curses are effective nor do we accept the powers of evil spirits...
The reality underlying this question is that the evil spirit, Satan or whatever is interpreted as evil, refers to the lower nature in man. This baser nature is symbolized in various ways. In man there are two expressions, one is the expression of nature, the other the expression of the spiritual realm. The world of nature is defective. Look at it clearly, casting aside all superstition and imagination. If you should leave a man uneducated and barbarous in the wilds of Africa, would there be any doubt about his remaining ignorant? God has never created an evil spirit
~ Abdu'l-Baha, Foundations of World Unity, p. 77
Influence of Evil Spirits
"You have asked regarding the influence of evil spirits. Evil spirits are deprived of eternal life. How then can they exercise any influence? But as eternal life is ordained for holy spirits, therefore their influence exists in all the Divine worlds."
(From a Tablet of 'Abdu'l-Bahá to Mrs. Ella Goodall Cooper: Daily Lessons Received at 'Akká p. 78, 1979 ed.)
(Compilations, Lights of Guidance, p. 512)
There are prayers for protection in the Baha'i writings..
An example:
Praised be Thou, O Lord my God! This is Thy servant who hath quaffed from the hands of Thy grace the wine of Thy tender mercy, and tasted of the savor of Thy love in Thy days. I beseech Thee, by the embodiments of Thy names whom no grief can hinder from rejoicing in Thy love or from gazing on Thy face, and whom all the hosts of the heedless are powerless to cause to turn aside from the path of Thy pleasure, to supply him with the good things Thou dost possess, and to raise him up to such heights that he will regard the world even as a shadow that vanisheth swifter than the twinkling of an eye.
Keep him safe also, O my God, by the power of Thine immeasurable majesty, from all that Thou abhorrest. Thou art, verily, his Lord and the Lord of all worlds.
- Bahá'u'lláh
(Compilations, Baha'i Prayers, p. 127)