using expressions

[Jason Ledford]

I am having a problem with my expression lists.  I am trying to block 
the search of words so I am using a second expression list to do that 
and here it is

(^|[-.?+=_0-9])(orgie|sex)?([-.?+=_0-9]|$)
nothing to fancy.  only problem is when someone does a search on 
anything it gets blocked because every search has an = sign.

what am I doing wrong with this expression.  I have since disabled it 
and am only doing words for expressions, like (orgie|sex)  only problem 
there is that sites that have those words are blocked, like 
www.demsextrememakeover.com which has nothing to do with sex but its 
blocked because of the word sex.

Thanks for any help