Yes it would be if you deliberately left the game however you said it wasn't deliberate. If you were in roleplay with somebody, send them a message stating that your PC crashed etc and that you will continue the roleplay when you get back on if they wish or alternately contact an admin on...
We used to have a modpack however it is no longer supported and may cause issues with your game. I would reccomend playing on our servers with vanilla Arma.
To be honest, I don't think it's necessary. Liking ban appeals etc shows respect and support and liking reports shows support or agreement with the post. If people are out to ban people, they will just expose themselves when they like every report open.
Personally I would not concider that advising as I cannot see that will effect RPUK negatively however I think you should await a staff member just incase
I have eventually ran out of capacity for attachments and am wondering how to delete old attachments or increase the capacity of it. Any1 got any ideas?