... and, actually, even these much-decried "not so random" sources are actually ... as my uncle would say,
"good enough for Peace work." 
They're not going to be flummoxed by power-failures, because they will use, for example, things like "the current time," as a partial source of their default entropy.
"Good enough for Peace work," then, but "not good enough for Cryptography." And, maybe also, not good enough for clusters of computers (especially, virtual machines).
Randomness sources such as
urandom are arguably
better, but the default sources certainly are not
ignorant, nor
useless.
So: do you probably want to
"re-seed" this PRNG = Pseudo-Random Number Generator? Almost certainly
not (IMHO). "Re-seeding" is basically there to be used when you wish to
repeat a "random" sequence (for some statistical reason ...). Otherwise, you probably don't want to do it, and (IMHO)
should not do it.
