You're only meant to use the downloads if you already own CS2, but as CS2 is seven years old at this point, this is just enforced with an honesty system.
People really like to dismiss that by calling it transgressive humor, but it's really not? You never truly get made fun of for being part of the majority.
you don't have to be dishonest, a ripoff, "evil/mean/douchey", someone selling themselves and their principles out for a dime, or morally bankrupt to become successful
Arguably the bigger problem is that interesting content is determined by popular consensus, which rewards ingroup signifiers and pandering to the majority.
The FBI might target them, but most likely for their laissez-faire moderation where deleting a subsection literally dedicated to child pornography caused a major uproar.
This seems likely - the "police are dumbasses" mentality, and popular image of LulzSec as clever hackers really doing it for "lulz", allow them to present stories like this -and- gain support.
Not to dismiss the possibility entirely, of course - but it is awfully consistent with their previous attempts to hide the fact that they're on a sinking ship.