I had some Asus laptop which had a switch to physically close webcam: http://www.bhphotovideo.com/images/images2500x2500/ASUS_N73SV_A1_N73SV_A1_17_3_Notebook_Co

I had some Asus laptop which had a switch to physically close webcam: http://www.bhphotovideo.com/images/images2500x2500/ASUS_N73SV_A1_N73SV_A1_17_3_Notebook_Computer_754854.jpg http://www.bhphotovideo.com/images/images2500x2500/ASUS_N73S... If you're paranoid, it could be transparent for IR or something though.