From where you got the exact user-base of bitcoin ecosystem ?
Even a newbie of this forum has more than 10 bitcoin addresses (obviously with some satohis from faucets) in their blockchain.info wallet.
You can't calculate the exact user-base due to the nature of the system, but you can use estimates in combination with the member database here to draw to some conclusions. Depending on what sources you prefer, let's start:
Coinbase: >5 000 000 Users.
Blockchain.info: > 10 000 000 Wallets.
Zebpay: > 200 000 Users.
There are many more though.
Let's take a look at the forum. Total number of users: 912 341. Total number of users with 0 posts = ~670 000. Now add people that are permanently banned, known scammers and whatnot to this number and subtract from the original total. This likely leaves us with < 200k active members. This is less than what Zebpay (India) claims to have alone.
New members are being trolled / harassed by default trust maniacs and signature spammers.
Please provide me with exact cases of said harassment. If you can't, then don't flood the thread with nonsense.