An oft-cited theory of security says that the more popular a security solution is, the more it will be targeted.
Let's try that in the real world. Suppose you live in a neighborhood prone to breakins. You have the option of installing a security system.
The theory would seem to suggest that if all of your neighbors have security systems, you're better off without one. After all, houses with security systems will be targeted more than houses without a security system.
Unfair? Fine, suppose your choice is between system X ($1000, monitors and alarms) and system Q ($100, stickers and a sign). If all of your neighbors have system X, are you better off with system Q?
Remember, any analysis that ignores the goodness of either option is fatally flawed.