The post you are reporting:
All human life is indeed here, but it's all been seen and commented on before, so there's really nothing new under the Sun. Certainly we can all think of members to whom the following might be applied:
Rabbie Burns had this to say of some of his contemporaries:
"O wad some Pow'r the giftie gie us
To see oursels as ithers see us!
It wad frae mony a blunder free us,
An' foolish notion:
What airs in dress an' gait wad lea'e us,
An' ev'n devotion!"
Alexander Pope described the behaviour of certain of his critics thus:
"Damn with faint praise, assent with civil leer
And, without sneering, teach the rest to sneer;
Willing to wound, and yet afraid to strike,
Just hint a fault, and hesitate dislike."
John Dryden also had this to say of the Duke of Buckingham:
"A man so various, that he seem'd to be
Not one, but all mankind's epitome;
Stiff in opinions, always in the wrong,
Was everything by starts, and nothing long;
But in the course of one revolving moon
Was chemist, fiddler, statesman, and buffoon."
But perhaps most of us should reflect on another of Dryden's couplets:
"But far more numerous was the herd of such,
Who think too little, and who talk too much."
I'm sure there are plenty of other quotes from literature which would describe various forumites to a T.