Yes by me.Anyone who doesn't go to church, who doesn't gather with believers to use their gifts for the benefits of others, participate in the Lord's Supper, and who isn't living in that community to which we are called, is living in sin.
By you? Who?
Can you still show the same church existing, that was established 2000 years ago, beginning with us understanding as children, and that we did not become men to understand all things, you can show we go to the church, that had wolves enter that flock/church.
That is why it is NOT SIN, to not go to a sinful place. ( men speaking perverse things to draw away disciples after them, seducing us, then no need for any man ( antichrist who denies that which is perfect is come.) to teach us.
We show the Lords supper/death in our body, not by rituals.
1 Corinthians 11:26 For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come.
2 Corinthians 4:10 Always bearing about in the body the dying of the Lord Jesus, that the life also of Jesus might be made manifest in our body.
11 For we which live are always delivered unto death for Jesus' sake, that the life also of Jesus might be made manifest in our mortal flesh.