I'm not for one moment condoning this action, but given that Omega Block is basically grid-bolted nowadays, it's hardly surprising that someone who doesn't know better (presumably) has done this. I personaly have climbed these routes many times and can confirm there is plenty of natural gear available. Ironically there is plenty of gear above Boogie, but no one is fussed with the lower off on that route. So would there be as much indignation if a lower off was installed instead of hangers?
I think this scenario should be a red flag for all climbers; as there is a huge influx of new climbers eminating from the burgeoning indoor gym industry, who are heading outdoors without a good understanding of the 'ground rules'. So how are this next generation of sport climbers going to be educated?