As a native speaker of British English I did not find the title confusing: I think the confusion is that the typical meaning of "warn to" and "warn about" are d

As a native speaker of British English I did not find the title confusing: I think the confusion is that the typical meaning of "warn to" and "warn about" are different. "warning someone to avoid something" suggests that there is a risk associated with the thing itself - they should avoid the thing "warning someone about avoiding something" suggests that there is a risk associated with avoiding the thing - they should not avoid the thing (e.g., "HMRC warns people about avoiding paying income tax")