True, it's different. I know some who would care, some who would not. I had a friend who was very into pink and Hello Kitty, and he didn't care what others thought, really. He liked anything cute and chibi. I don't think it should matter what you like, honestly. Alternatively, you can leave the Tama paused while at school and care for it when you come home, that way no one sees it and it doesn't have to get ruined. (There's a chance you could break it if you remove the plate and all, not sure how high a chance, but I'm sure there's a chance.) I mean, even if you remove the plate, someone's going to notice, right? Heck even though I played some 'manly' card games, I still got poked fun at for it and eventually quit since no one wanted to play with me. Probably a bad example, but you get the idea.
I guess I'm just OCD, but my deal is, if I pay 50+ for something, no matter what it is, I'm going to try to preserve it as much as possible. If you like something a lot, it shouldn't matter what others think in the end.
In the end it's up to you, though. I just had an opinion because I cringed when I saw that picture. >_o;