That first sentence is funny, Shireen.  I've heard from a Japanese Atheist/Buddhist that she doesn't pray to the idol, she prays to the spirit of god that the maker of the idol was trying to lift up.  It's ridiculous.

Yes, I've seen quite a few "Christians", and even some "SDAs" who keep souvenirs such as idols in their homes.  As nb mentioned, Paul makes it clear that they are really nothing at all, as they are inanimate, and there is only one God.  But to have something that God detests in one's possession is sin.  God makes it abundantly clear again and again that if there is one thing he hates most - it is idol worship.

I used to go to an elderly SDA member's house once a month and hold a Bible study with them and several other church members.  One time I came 5 minutes early, and saw they had fruit placed in front of a little Buddhist altar.  That altar was in a box which they had always kept closed before.  I didn't say much about it then, but expressed my surprise.  The next month I gave a study on Elijah and Mt. Carmel.  Then the month after that I gave another study on the first 4 commandments, and asked them to make a decision.  They said that they had already talked with their pastor about it, and he had told them that it was OK to have a Buddhist altar in Japan, and that I didn't understand their culture.  I told them if they can show me where God makes an exception for Japan, I would be happy to believe it, but of course they didn't have that, so I never returned.  In a different SDA church, the head elder said it was OK to keep worshiping idols for a while after becoming a new member, and gave the case of Naaman as her support.  I remonstrated with her, but she wouldn't budge, so I won't be going back to that church either.

There are just some things that Satan claims as his.  I'm no exorcist, but those who do that sort of thing nearly always tell of some kind of object that in effect gives license for Satan to come in.  What is scary, is that I heard from some missionaries in Cambodia that even if you don't know that an object has had a spell put on it, just by taking it, you can become demon-possessed.

I live in a rented house, so cannot control what my landlord has in their house, but among my possessions, the closest thing that I have that looks like an idol is a sandstone sculpture of an Easter Island head that one of my English students gave me.  As far as I know, those heads were not used for worship.  But if someone gave me an obviously heathen symbol, I would throw it out.