I also agree some of the above posts. You have to take the good with bad and make the best choice for your situation. For the rest.....I say be a duck!!! and just let it roll off your back like water.
I'm not sure it would help but if you put all the efforts you have done for your tank or tanks and put it in your profile. Then ask that people review it before responding. That may or may not cut down on the "off" responses you get, I don"t know. At least it will save you the time of retyping all of the efforts you have made to this point, every time you have a new post.