I took all their bukkets and gave them to the lolrus for christmas. Sorry folks!
I saw one news report where a commentator claimed, after talking about how they would sometimes sun themselves on people's boats, that the sea lions were "damaging to the environment." Of course I know she meant the boats and maybe the pier itself, but come on, as human beings can we really say ANY other animal is "damaging to the environment" with a straight face?
Hopefully they found a better spot to call home.
Honestly, it's fine that they're gone. There's way too much going on on that pier, there's probably a better place for them to go where they won't be stared at at all hours of the day.
Plus it might smell better there.
..and whether a plant in its native habitat under control of its natural predators and pathogens can be truly invasive by definition even with human intervention isn't really clear.