I find this study to be extremely flawed, not to say elitist / racist.
Yes, people who fit a stereotype of those I dislike like to have friends who are similar.
If the study had been conducted with 2000 subjects from places with people like me, I'm sure the results would've been more comforting to me.
FTFY
This is seems like a permutation of the Butterfield fallacy
Whichever attack you've decided was the "most visible" was so because it was missed.
Fortunately this doesn't affect arguments regarding the proper scope of surveillance, but unfortunately it underscores that people are often oblivious to their assumptions. In your case, it's that you would have heard of stopped terrorist plots. I'll agree that it's plausible because of the temptation to brag about success, but far from certain.
Semi-related question: does wiretapping law protect someone operating like you? That is to say, since presumably you don't notify everyone that you're running tcpdump to see their activity, and something as benign as recording the hostnames in DNS queries could be considered wiretapping, does the individual connecting to your network bear the responsibility of "assuming" you could do such a thing?
I ask because I remember in college we were specifically told we could NOT use the internal network for "real world" traffic data, and that recording anything, either in promiscuous mode in a crowded lecture hall or even at a router behind the WAP would be illegal/unethical/both
Model.where(some_field: 5) is not the same as Model.find_by_some_field(5). The #where method returns a lazily evaluated database request which functions more or less like an array. #find_by_... returns either the "first"* model to match or nil if no models match and is much more useful for one-liners
* IIRC no ordering is guaranteed unless you have an #order portion in your model default scope
An authority is a person who can tell you more about something than you really care to know.