a person cannot receive God's spirit if they deliberately alienate themselves from his visible organization.
Maze, that's rubbish. That firstly presupposes that any earthly organisation is the equivalant of God and secondly, in context, that the WT is such an organisation. Paulapollos is absolutely right, neither of those passages is talking about an organisation.
Can't a person receive holy spirit by requesting it of Jehovah in prayer?
Serenitynow, God the Creator of Heaven and Earth, who loves each one of us and sent his only Son to earth to die for us, cannot be limited by teachings of any organisation, no matter how loudly it tells itself that it is God's organisation. Do you think an all-powerful, wise and loving God can be limited as to how he sends his Holy Spirit? Just as the wind blows where it pleases, the Spirit of God will do as God wills, at his pleasure and when he chooses, and we know that we only have to ask and we will receive. Of course you can ask for the Holy Spirit in prayer, and God will be answering your request before you've even made it, since he can read your heart.
That's my take on it anyway. That's my understanding of what the Bible says.