It is very civil for a message board. Unlike several very popular boards, there seems to be positive peer pressure to behave and not post intentionally offensive things. Attempting to keep almost everything On Topic (RC51 & Ducatis mainly)
really helps IMO. There appears to be far fewer bad apples here than on some other boards.
I used to post on a popular car forum. They have an Off Topic section that is nothing less that a cesspool of narcissism, immaturity, political parrots, and bigotry. The mods and site owner appear to encourage and actively participate in this behavior. The hard feelings from Off Topic then spread to all other sections of the site, old enemies would dig at and libel each other everywhere, in any thread. Some influential/wealthy members were the worst offenders generally speaking and were never banned. And the site owner wonders why he may have thousands of "members" but only a few hundred actually post anymore

.
Speedzilla is a fantastic forum with great members talking about very cool bikes.