Easier said than done...when you have 90+ pounds of rock in your tank and fish that have their "homes", taking it all out to pluck would be difficult. I tried it when it was only on my top rocks, but now I have a few on my lowest rocks that support the whole mumbo jumbo. For me, I'll suck out what I can. It's not harmful, just unsightly to some. Most who look at my tank ask, " what are those cool green ball looking things?". unless they completely cover everything...then I'll freak out.
I forgot to add Carey! Emerald crabs are known to eat bubble algae. Even if you don't have more than a few bubbles, they'll help control it so it doesn't get out of hand.