We may have a solution for those of you being randomly kicked. Based on a post that Vistor found it appears that the problem may be that (a) you are using a HDD (spinning disk) instead of a SDD (solidstate disk) and (b) you have less than 8 GB of RAM. This makes some sense to me given the number of mods that we have on the server - and you have to load as the Arma client. It seems that the client-side mods are still loading. Also, if you have less than 8 GB of RAM your computer has to "swap" memory to disk; that is, use your hard disk as virtual memory. This is really, really slow!
Once you are 'boots are on the ground', open your map right away and zoom into them map much as possible. Do NOT move or do anything for at least 5 minutes. If you have a HDD light, you will see it doing its thing and when it is done, the HDD light will almost stop 'flickering'. Once the HDD light is 'normall then you can play as normal.
By zooming in, your computer can verifing the files instead of drawing grass and trees while the wind blows them around, etc. When you are 'looking around" ArmA is loading in more details, etc.
The person who posted noted that he suffered from this off and on for a good while. Once he (and others) followed the suggestion above it always worked 100% of the time.