For the most part, the innerworkings of a Lego brick aren't all that complex. It's just a matter of good Geometry, really. But looking at these patent sketches submitted in 1958 (and granted in 1961), make me happy that Lego didn't have to live in an era where their efforts might be thwarted by a patent troll. Our childhoods would have been lesser because of it, even if we never realized it.
Trolling isn't defending your IP. It's when a company buys up IP for the sole reason of sending out threatening licensing requests that are likely to gain acquiescence based on the alternative of costly litigation rather than likelihood of infringing behavior. If they own it, it's theirs to defend and profit from. Trolls are just gaming the system. Imagine if you were an inventor that had to sue (insert a beloved company here) because they were just ripping you off. Many of the commentors in Gizmodo would be shouting 'troll' in your direction!