ezboard would sometimes log me off for no reason but it would still do the post so I didn't lose it. There are some forums that will kick you off after 5, 10 , 15 or whatever minutes of inactivity, which is pretty darn annoying when doing a long post. Best to do it in an editor of some kind and copy and paste it.
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"If you are not concerned about your neighbor's salvation,
you should be concerned about your own."