Thing with forums, is that people always want to hear positive things and take any negative comments to heart and feel that they have been insulted in someway.
Surely a forum is all about discussion and evoking ideas, so constructive negativity is good to some degree. (In my opinion.)
Not once did I tell the original poster not to go ahead with his idea. Fair enough, I said that I think a website focusing on local classifieds is pointless, and i'll stick to my guns here, however, there are reasons for this, as pointed out.
It's how you take the criticism that counts, fair enough you can disagree with what I have said, but it is constructive, so maybe something that has been said is worth listening to.
For example, maybe the original poster was unaware of vivastreet as well? If it was me in this position and had the passion that everyone repeatedly keeps going on about, I would think "hang on a moment, what are Vivastreet doing wrong"? and also, how I could add value on top of vivastreet in order to prove a success and grab a good share of the market.
If life was full of positivities, then we would be in some serious ****. Can you imagine running a business where constructive negativity is not allowed? How would you plan, strategise and make decisions within the organisation?
Key skill here is to be able to turn Negativity into Positivity, while being strong minded enough to make final decisions based on the evidence/ discussion presented.
Oh, and with regards to .com businesses, i'm all for them.