why would someone remove the PCV valve?

[Lance-ftw]

topic says it all really...

I bought my truck a few weeks ago and took it up to the shop I've been using for my fiance's car and my old kia before it went boom. They did a bunch of random work like seals, gaskets, etc, and while inspecting things noticed I had no PCV valve, the grommet in the valve cover had some wadding packed in it and tape

They put one in for me but it's bugging the heck out of me, why the hell would some one remove that? What benefit does it present?

i've been watching my oil pressure carefully since then because in my head I keep thinking there had to be some reason they pulled it in the first place, maybe the engine ran on low pressure with one in but in that case wouldn't you just get a stronger valve? I dunno... I'm confused... show me the light smart people!