Just been through you post history and my eyes are just hurting. Your profanity level is off the hook.
About 2-3 months ago my two good friends - simple regular users (read some here, some there, post a little) were banned same way. At first i didn't believe them - why would mods ban their users with no reason.
By "friends" you mean your alts?
The strange part is there was no warning so i could stop doint bad things. Also, the amount of spam was around 20-25 messages per week. One of another accounts of mine was banned for same reason but only for 7 days. Also the "7-day" banned account is Newbie, while main acc is Member.
Most likely reason is ban evasion.