Bowzer:
You are suggesting that YW is wrong for being on the internet. Why don’t you tell them that? If they disappear, all this wrongfulness we are all engaged in will stop!
And why is a “heter” needed? It isn’t a halcha. And where is it written that email is kosher but yw is not? How is email more kosher than yw? Who made up this rule? The takanos I saw made no such distinction.
One you have a kosher connection, why should it matter what kosher activity you do, be it yw or be it a nice email to some1?