Although in most cases it doesn&#x27;t matter, I wouldn&#x27;t do this.  Remember that the PRNG will only output unpredictable values as long as the initial seed was unpredictable (and unknown).  As stated in the article, there is actually one time where you care if you have enough entropy -- the first time you grab a random number.  After that the PRNG is seeded with an unknown value and you are fine (assuming you waited until you had enough entropy).  Before that, you aren&#x27;t.<p>BSD&#x27;s implementation seems sensible -- block the first time and then don&#x27;t block again.  Or potentially block if you haven&#x27;t reseeded in X amount of time (X being configurable), to defeat the situation where someone figures out your seed.  Although, I have a tough time understanding how someone will figure out your seed without completely compromising your system anyway... but systems are supposed to be robust against attacks that one can&#x27;t immediately imagine ;-)