If we were considering beginning a church softball team for fun and maybe even as an outreach, then it would be reasonable to suggest if it doesn’t contradict Scripture, then a reasonable person should be open to it. The Scripture doesn’t directly speak about participating in sporting events, therefore indeed a reasonable person should be open to it. However, we are not talking about sports or eating sushi or going to movies. We are talking about whether Christians—inhabited by the Holy Spirit—can be demon possessed. The Bible has much to say about possession as compared to softball teams. Therefore, I assert, a reasonable person should make every effort to ensure they are involved with the truth, and frankly you are not even attempting to make a biblical argument. I consider that unreasonably cavalier. You are attempting to engage in the supernatural while now admitting the Scripture does not address what you are doing. That is not reasonable—it is reckless.
The problem is your position does contradict the scripture,
You, dear children, are from God and have overcome them, because the one who is in you is greater than the one who is in the world.
I John 4:4
Now, I know you are going to ignore this very to the point passage. However, there is no getting around this very clear language. The Holy Spirit is in us, and He is greater than he that is not in us.
Just exactly how would you like the Lord to express this to where you would accept His Word?
Regarding your narrow, restrictive comments I say this...yawn.