Since then I have focused on being the fly in the ointment...
Oh, no! Don't say that! If there is an "ointment", it is not wonderful! It is made of flies, and you are one of the people who twists open the lid and says, "Ewwwwww..."
Say instead that you're trying prevent people buying a pig in a poke - or as the German goes:
Die Katze im Sack kaufen.
("To buy a cat in a sack")
You bring attention to the details that people would be wise to do before buying a penny stock and which many people do not appear to do.
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