1. I'm aware of what "the brown acid" is. I have running sores older than you.
2. What pissed me off was the incredibly condescending manner of your post, and the passive-aggressive follow ups.
3. I'll let this go. You might consider reading your posts from the other guy's POV before posting. It is entirely possible to get your point across without sounding like you're talking to a 10 year old.
I'll take you at your word that you are ancient, but I find it hard to believe that you are that much older than I. Not that it matters.
I think these kinds of forums make it excruciatingly easy to both give and take offense. I rarely intend to give offense, and I do my best to not take it. I'm not always perfect at either.
I've always tried to consider both my audience and my message when writing. Perhaps I've misread this audience, perhaps I'm much more abrasive than I thought. But in general, I will stand by what I've written and will try to clarify if I haven't communicated my intent appropriately. In a place where the meaning of words is debated regularly, I would imagine this is necessary frequently. I can see how my post could have been taken that way, and it sounds like you respect that it wasn't my intention. I'm more than happy to consider constructive criticism, and will do my best to heed your recommendations.