I use IMO so that newbies or people who just surf through will know that what I am saying may not represent the mindset of the group as a whole.

Sometimes, I get really upset when I see someone on here make a broad declarative statement which implies that that is the way it is and that's to be the end of it. THAT gets my back up and I immediately want to challenge their stance, whereas, if they'd just added the IMO, it would be altogether different.

kat