ok, so i'm playig world of warcraft
and my guild has just started the c'thun fight

(this fight involves 40 poeple, and lasts about 15 mins, and every single 
person has to be on their toes)

every 30 seconds to so, a big ass red laser beam totalys wipes out 
everything in the eniter fight room
so i'm there, ready to move out of the way
oh crap not now
0.1 fps
with this huge ass red laser beam plowing the floor getting near me
alt tab (quuiiiickkkkkkk!!!)
task manager
find wow.exe
change priorty up
back to wow
RUUUUNNNNNNNNN
with singes on my ass lol

http://www.wowwiki.com/images/7/76/C'Thun02.jpg  <-- big ass red lasers, pew 
pew etc......

does boinc really have to randomly do benchmarks, it does sort of take over 
your computer for some vital seconds :)
(it's not normaly a problem, but that one was a bit close for confort hehe)
no, i really don't want to be bothered by boinc, i just want it to sit in 
the background and chew on the spare cpu time thanks