Do you provide seaweed for your Tangs 24/7?

[Myka]

I've come across several articles recently that recommend Tangs be provided with 24/7 seaweed.

I don't agree with this in theory because, assuming the tank isn't packed with Tangs, they will get a lot of natural algae by grazing, also assuming the tank isn't completely barren of algae, though I've never tried it. I also think that by providing seaweed 24/7 it will make them lazy and they'll just be gorging on the seaweed instead of cleaning the tank! Not to mention that Tangs are absolute pigs and would look "pregnant" 24/7 if they were provided that much food. Maybe it wears off for them, and they are less piggy if it's always there?

Anyway, does anyone actually do this? How much do they actually consume each day when supplied 24/7? Are they less likely to gorge themselves when they are fed constant like this? Do they still do a good job grazing the tank?

How often does everyone provide seaweed, if not 24/7?