What would really happen - what you described or would people stop trading? Do people really HAVE to trade, or do they do it from covenience? If the latter, then by removing convenience of Boston you actually lower incentive of trade greatly.
I think that in case of most transactions, risk and effort required to commence them would make people rather get stuff on their own than trade.
Somehow I can't see people trading stuff like lime if they would have to haul it in containers across the map, risking being ganked on the way, risking being ganked at the trade place, or having to pay for fast travel. The only trade that would remain would be exchange of high valued / purity goods.
Which brings us to noobs - their usual forms of income are selling stuff to the NPC and selling common stuff like hay, mushrooms, herbs to the higher level players. With Boston removed do you really believe that noobs would travel anywhere to sell their 10 hay, so that they can buy 2 nails?
As for fast travel - if we are supposed to have it, as it was proposed, then why would it be any better than fast travel to and from Boston like it is now?
If you want to build community then you should promote meeting together, not remove place where meetings occur.