This is one thing I constantly remind people of, we are reading words on a screen. You can not hear the tone someone is using, and whatever tone is used for that statement is your own interpretation in your own head. If you ask a question, and you read a reply and feel bashed on, you're going to think that person's using a bashing tone against you when in reality he isn't. It's very hard to just take words at face value because we're typically emotional when we talk to each other. That's why sometimes when I know I'm about to make a comment that can be taken negatively, I will add a word of positive reinforcement at the end of the statement like bro, or buddy.
One thing that I will say that will make me sound like I'd come down on someone, especially noobs, are the ones who just get the equipment because they got it cheap although it's totally impractical like 250W on a 10g tank? See, that can be taken as a bash, but truth is, it really is impractical! A personal friend of mine picks up a 29g tall tank, and asked me to convert it to a reef for him w/ flourescent lighting. Fortunately he's my friend and I can just laugh at him in front of his face w/o his feelings being too bruised, but again, ppl see a good deal before proper husbandry.
Sometimes we don't mean to bite people's heads off, but as more experienced hobbyists, there are certain things that we are aware of that you should not do at all. If a person is about to treat their reef tank w/ copper, and we know that's not good at all, and despite our best efforts to be nice, if that person still wants to do it, then what becomes the "responsibility" on our part? Do we just let them go and destroy their tank? Or do we take a firmer stance? These instances do happen on many occassions, and although it is "their" tank, I feel as an experienced hobbyist, to help save some n00bs from the agonizing growing pains that I've gone through. But then my "give up" statement is "some ppl just gotta learn their lesson on their own", and then they get upset at me for saying that...:lol: