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While I am not opposed to Garou having repercussions to learning suspicious lores and forbidden knowledge, I find the threat of taint to be fairly drastic. There is nothing backing it in the book that taint is in, and the Wyrm Lore passage in the same book makes no mention of it. It does mention a chance of gaining derangements for learning wyrm lore (with a mechanic of gaining one when your level of wyrm lore exceeds your willpower), which I feel is a better representation of corruption that such information can inflict.
The Org also has instances where certain abilities are dangerous to learn and the higher rating you have the more you attract enemies in relation to what you are researching. Which can be lethal, but not as drastic as being banned from the Sept because you are learning more about your enemies and can't keep yourself cleansed in doing so. Which if you are a higher level Garou you would know how to do, but being targeted in a fight because your wyrm quarry knows who you are is something that not even the best garou could immediately expect.