"Antitrust deals with breaking up colossal monopolies like AT&T and Standard Oil." Not true there is also collusion to consider, price setting, dividing market

"Antitrust deals with breaking up colossal monopolies like AT&T and Standard Oil." Not true there is also collusion to consider, price setting, dividing markets etc. For example web hosting companies can't band together to set pricing or to determine certain things as a group. (Obv. companies get together to set standards etc and other things). I'm just raising the issue but I know this from back at the beginning of ICANN registrars we had to be concerned with what we did and what we said to each other when we had group meetings on the advice of attorneys in our registrars constituency. And I'm not saying that the lawyers weren't over reaching or that particular behaviors had merit I'm merely mentioning it as a point of discussion and consideration.