If you don't like the thread then leave it alone and don't participate in it. Its fun threads like this that keep it interesting for alot of people. Don't kill it cause you don't want to see it just move down to the next one.
If they take it that personal then they have issues. When i rate a photo i look at more than the subject matter , i look at composition , detail and clarity. Photgraphing fish through a sheet of glass is no easy thing to do. I have yet to produce a photo of my fish that i am happy with but if people rip me for it oh well. I have just made the switch to digital ( whitch is why i can't produce the photoes that i like ) so i have to replace everything but my glass ( lenses). I did notice quite a few i'm not a fan of this fish or that fish and when they say that just let it go , don't bann yourself from the forums cause of it. Now i'll give you chance to bash some of my pics so here they are have fun. I won't leave the forums either i promise lol.