“It is especially important to be wary when introducing massive programs, efforts, or expenditures, which are more likely to give rise to the unexpected.”
“One should also be wary of strangers who ask for information not related to their professed area of interest or do not seem to be particularly knowledgeable in their field.”
“Be especially wary when responding to these types of solicitations.”
aware
Vigilant or on one's guard against danger or difficulty.