Do you think that a brake booster would be beneficial on a 20" folding bike? (Dahon + steel fork)

I wondered if because of the shorter fork size and the smaller wheels if this would perhaps not be very useful. On the other hand, these are not mega-bucks bicycles and so perhaps frame/fork strength is a little weaker compared to more nimble steeds.

Thoughts? Only useful on the front... or the back?