I agree, whether an idea sucks or not is a very subjective thing, and sometimes it can be naive to believe that what you think is going to apply to entire popul

I agree, whether an idea sucks or not is a very subjective thing, and sometimes it can be naive to believe that what you think is going to apply to entire population of the planet. That being said, one should probably point out why in your opinion the idea is weak. Just stress the fact that this is just one opinion, not the ultimate truth.