This!
The thread was closed so I can't bring up what it was about.
And it is bullying behavior. So if someone exhibits this behavior 20 times to 20 different people it is not bullying but if they do it 20 times to one person it is?
If you say that X is lame then you are implying something about people that like X, aren't you?
No, you're implying something about the thing you think is lame. Namely, that it's lame.
I hate country music. Hate it. I grew up in the south where everyone else loved it. I have to have said hundreds of times over the years that I hate country music. I think country music is beyond lame - listening to it is like torture. To me it sounds like someone beating a cat with a banjo. I'm not bullying anyone, I'm expressing an opinion. Fortunately I'm allowed to do that, and the people who do like country music understand that my opinion on the "music" has nothing to do with my opinion of them. (Except maybe that they have questionable taste when it comes to music!

) Now if I kept calling them stupid and idiots because they like country music, and said I was going to kill them over it, or beat them up every time they listened to it, that would be bullying. But if my dislike is aimed at the music and someone takes that as bullying, then they need to grow a thicker skin.
I like Nickelback. Most people hate them, and there are countless jokes about how awful they are. There are even jokes about their fans. Do I care? Nope. I still like them and you are free to hate them if that's how you feel. You can say you hate them 200 times to me and I still won't feel bullied, I'll just feel like we have different taste in music. I can't imagine being so personally invested in something I like that I take criticism of that as personal criticism. And even if it was criticism, that still isn't bullying. Though that does seem to be a common misconception, especially on here. I remember one parent on here who wanted to get some girls banned from a social networking site because they were "bullying" her daughter by repeatedly insulting Justin Bieber.
People like different things. The fact that someone dislikes something that brings you joy doesn't mean anything except that you have different taste. There's nothing wrong with that. You can't take it as bullying and personal criticism every time someone dislikes something you enjoy, or you're just going to be a perpetual victim because there's no way everyone is ever going to like the same things and fortunately we're all allowed to express our opinions about what we like and don't like.