Yeah let common sense prevail, when you know what it is about a grow that can get you caught, you can do whats necessary to improve it etc. The problem with a 1000w light is sheer heat, not so bad in a room sized space, but if its a smaller area you're growing in that heat will build up fast, so don't cheap out on the ventilation, and as mentioned always a good idea to vent cold air, rather than hot.
If you do everything right only three things will ruin your day. Betrayal, Loose Lips and Complacency. Ideally, tell no one, not a single soul that you're growing, ever. If someone else has to be involved, you'd better make sure they understand the rules. Complacency is that safe feeling, the longer you grow the easier it is to forget that what you're doing can quickly become real. Also HEAPS of people get caught because of the smell. A neighbour could phone the police, or the police could come to your door for something completely benign, get a whiff, then bang, busted.
One of the funniest I read in the papers (I think thats where I read it, lol), was the police were raiding a guys neighbours house, and the police actually went to his door to borrow a ladder or something. The guy obliged, but he ended up getting caught because when he opened the door, a wave of ganji-stink wafted out. Now that guy did NOTHING wrong, and probably wouldn't have gotten caught, it was just because he fucked up for a moment and got complacent.
So yeah don't stress the leccy too much, lot of other wee details to think about above that.