^ you can do it, but you're more likely to get caught than not.
People have been known to extract out the chimney and be all right towards the start of their grow, but one day walk home from work/college and find their whole street has taken on a strong smell of ganga, with people forming crouds trying to find the source.
In any grow, there's no compromising on carbon filters. You also should not skimp on the quality of your CF, as cheaper ones often don't even last one grow. I got one and after about three weeks it was as if it wasn't there.