Fill memeory with endless loop?

[globalrev]

if i do something like
while 1:
    print "x"

will the program ever stop because it runs out of memory? or is the
print x never stored somewhere?
if u do soemhting like add element to a list it has an upper nbr of
elements right? if though huge...
does windows or any other OS have some proces that would stop
something like this after a while? could be interpreted a s a virus
perhaps?