Want to decrease the chances of an internet marketer seeing (and stealing) your ads? In the targeting section just choose "exclude" and type in "internet marketing" as the interest. And/or exclude the "facebook page admins" 
What do you think?
Nice idea but 1/4 of Facebook users are admin of a page, so I wouldn't recommend it for this purpose - as even still - a spy tool may pick up your ad regardless.
However, for the purpose of further segmenting audiences. Inferring that if user IS NOT page admin, then they are less tech savvy AKA more likely to partake in certain offers.
Great idea Anin!
Although you can't hide from spytools but not many willing to invest to spytools so you'll def keep away the newbies with low budget.