Can I just say that the lumping together of youthful forum members as irritating isn't about age – Radius and ilovebikes don't display the irritating tendencies, or at least I haven't noticed it – it's about threads descending into pointlessness. Yes, we don't have to read them, but we don't know they've turned into irritating to-and-fro-ing by the youthful element until we've waded through a bit.
Yes, the older members of the forum can be annoying too. But it doesn't seem to be concentrated as much within individual threads.
And Joe24, although you don't think spelling and grammar matter, many others of us do. As mentioned above, some forum members have problems with spelling through dyslexia or for other reasons and I think you'll find that we don't have a go at them; however, we assume that if you wanted to write properly you could, and so try to encourage you to do so. It would help your future employment prospects. And don't dismiss that comment as rubbish because part of my job is correcting the spelling of every email and document a colleague writes because the company isn't willing for the impression it makes to be so dragged down; this colleague is a lovely chap but if the company had known how bad he was at writing they might not have employed him. Businesses want to give a good impression and an initial piece of communication, such as an email, goes a long way towards providing that impression.
Radius can do it, why don't you try to out-grammar/out-spell him!