Wow. That is so sad that you cannot put up photos and such. I am sure that these same people would not think twice about putting up whatever picture they wanted to remind them of something positive in their life......
Wait, maybe thats it. Maybe they dont have anything in their life and so they are secretly jealous of you and the joy you have.
We have dogs and cats and I love to come home to both but my dogs show me that they dont care what my day was like they are just happy to shower me with love and welcome me home. I would hate to be without that love every day.
I personally think you should put your pictures back up. I have a digital picture frame that has all my family rotating through it (skin and fur). I get comments all the time. I dont bring the subject up other people do.