If you should choose your close, two things need to be done first. First you must have adequate proofing on the inside of the door. This can be done by even hanging a long robe on in front of it. Also, you'd probably want to leave the clothes in there (if it is a walk in or a farely bigger closet). Split them evenly and push them all against the wall on both sides. Secondly, you must keep in mind that although this may confine your screaming somewhat to make it pleasant enough for your roomies, it will not keep out the outside noise and stuff. So, you may have some leaking going on. What you can do with that is have your mic on a compressor or limiter and set the gate a little above the your lowest vocal range. You'll have to figure out what decible that is... :o)... It seems like a ghetto formula to a somewhat expensive process, but if you are desperate to get your stuff goin; ghetto works... It is how I started out. But as in the previous reply, a bathroom would work better as it has a better acoustic reflection. As for screaming, you may actuall want to lay those down as punch-ins from the bathroom. There are many different routes you can take. As for me, I got hella creative and just built a vocal booth in my basement. A room within a room, double insulated in the walls and triple insulated on the ceiling to keep my kids' feet from bleeding into my tracks. hehehe. Don't know where you are located, but I am located in Tacoma, WA... If you're anywhere near here, give me a holler and we might be able to work out something. nlpstudio@comcast.net
If you need answers or tips for anything home recording and engineering wise, just drop me a line. I've been doing this for 11 years and love helping folks out... peace...
Donald "720" Counts
Owner/Chief Engineer
NorthernLight Productions
nlpstudio@comcast.net
also lead singer of 7DX7
http://onlinerock.com/musicians/7dx7 
:p