Bitcoin is decentralized and Bitcointalk was created for discussion about it. Requiring fee for newly registered ID will be a bad idea for a decentralized ideology. Forum are getting enough funds on the forum ads space income so charging fee for newbie just to counter the possible new account of the user that tagged by DT is not necessary. It will backfire soon on the forum because it will discourage newbie to enter on the forum since there are a lot of free crypto related forum out there that they can gather data.

The intention of this suggestion is good but the effect of it on the forum image might be a disaster sooner or later.