Personally, I just feel slightly bad for the point-buyers, as point-buying isn't against the TOS... but got the hammer based on association.
I don't feel bad for them in the slightest. They wanted a shortcut to gaining gear/points rather than doing it legitimately and shortcuts always have risk.

It's not hard to figure out that by buying points/teams, you're only encouraging the sellers to get more "product" as quick as possible. Just like buying gold makes the gold sellers want to hack accounts and exploit the game to get the most amount of product with the least amount of effort.

Buying points/teams is exploiting the arena system and most certainly not within the spirit of fair competition ... why would anyone expect that those who partake in offering such services would abide by all the other rules of the game like not win-trading?