I'm the world's worst at trying to say the right thing...much less "type" the right words, and it is difficult for most to put the correct words into print...in a manner that cannot be taken out of context.
I've found (and this doesn't always work) that if I type my responce, then read it, wait a bit (perhaps to calm down)...then repeat, I often change or delete my initial post.
I'm a member of alot of online forums, and I've seen folks that I know personally...write posts that are easily read the wrong way. I try to avoid confusion by entering an "LOL" or <G> if I'm trying to be funny rather than serious, and if my posts are taken out of context...I try to immediately make my point clear, and malice free.