Leniency for Food

After talking about the 20% leniency with percentages of what we're getting out of our daily foods makes me think of what else we allow.  I remember learning in one of my classes last year about milk and meat.
Milk has a puss count, a certain amount of puss is allowed to be processed through with milk.  Even though the milk is pasteurized, I don't think many people would enjoy the thought that puss is being processed through for us to drink.
Another thing I learned was that meat has a hair allowance.  The meat we eat is allowed to have a certain amount of hair processed through.  Supposedly hair is not digestible, so why are we allowed to eat it?  This I feel is a little worse than the puss count, because puss, to me, is like yogurt bacteria and we eat that with no problems.  However, knowing that I am 'allowed' to eat meat makes me think.  I just don't get how it's allowed, even though it's a small amount it is still a little disturbing to think about..  Ignorance is bliss.

What other allowances in food/drug are out there that people might not want to know about?

In response to Paige's "Self-Marketing"

I agree that people lately have had to do crazier things in order to get noticed.  Seeing the outfits that Lady Gaga wears on the regular makes me feel like I'm watching Bam Margera and the Jackass crew or Ali Boulala (professional skateboarder).  These groups dressed and did ridiculius things to get noticed and make a name for themselves.  I feel that they had some more talent than Lady Gaga though.  Maybe not "Jackass," because they just end up hurting themselves and acting like buffoons.  But we see the self-marketing in other sports as well.  Terrell Owens and his many celebrations, same with Chad Ocho-Cinco.
Looking back, Larry Bird never did anything crazy to get his name out there.  He just played like a champion every night.  He talked a lot of trash during the game, but once the game was over, he was just a "regular guy" with a dream job.  A different story, Dennis Rodman, different hair every game, crazy antics; kicking a camera man for being in his way as his fell out-of-bounds in a game, and an inside fire that could possibly burn you if you came to close.  Dennis Rodman was just crazy and that was his marketing strategy.

What crazy marketing strategy will be brought about for the next "star?"