Waheguru ji ka khalsa, Waheguru ji ki fateh

IMHO i dont really thinks a bad thing to have pictures of our Guru's at home, or anywhere else. As long as, like Veerji said, we do not begin to worship the photo. Sometimes people need to have something that they can see right in front of them, and thats what the pictutre provides something tangible that we can see. Not that we are praying to the image, but the values that that image may represent.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-gurus/14776-gurus-pictures-and-portraits.html
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=14776
Now you may say, thats what Guru Granth Sahib is for, HE is our eternal Guru, why do we need picture? For moorakhs like me who dont have Guru Ji's saroop in their house, and who may only get to go to grudwara once a week, sometimes having a picture of Guru Nanak Dev Ji in my bed room helps to remind me of the values that Sikhi teaches us. Yes, worshipping the picture is wrong, but i dont think that "worshipping" the values is.
bhul chuk maaf karni
Waheguru ji ka khalsa, Waheguru ji ki fateh