Actually, this is not possible for normal users. Only administrators and moderators have the ability to lock threads when they find it pertinent to do so. Sorry for any inconvenience this has caused you.
Let us know if you have any other questions.
OIC: This "Esteban Vihaio" is actually either a moderator or an administrator of this forum AND this "Esteban Vihaio" locks certain threads rather than allowing feedback and responding to it.
This is particularly true concerning Ayn Rand and Objectivism, which "Esteban Vihaio" merely slanders and posts ad hominem attacks against. Hey, Chris, I just CANCELLED my subscription to your sorry assed forum because of this.