More of a question rather than a dispute.

I got a warning for "NOT SFA material" and I was wondering what that meant?

 

Have a look at this sticky, and this one.

The rules stand for a few things, but basically it's trying to set a higher threshold for what a non-spam post in the SFA is. Fundamentally, if you post an opinion, the rules require you to give some form of reason for why you hold said opinion. Alternatively, you might be questioning someone, and so you'd have to ask a reasonable question. Ultimately the rules are trying to promote more quality content, and there's no bright line between what is acceptable and what is not acceptable.

Feel free to message the moderator who gave you the warning for what they thought.