I find it funny that you say disguised antennas suck because my cell phone works within my bathroom, which is enclosed by a standard gypsum wall and then behind a standard gypsum bedroom wall, with aluminum siding on the exterior -- and with my 8 year old phone I can hit cell sites 5 miles away (I see this on my bill from time to time).
Now, if my flea-powered cell phone can penetrate 4 half-inch walls and aluminum siding that well, a cell transmitter/receiver can certainly do that from behind a 1/4 inch wooden fake birdhouse wall.