This will be short and sweet, unlike the reason I'm posting this tip. I will say up front that I have slipped a few times.
If you want to make money doing artwork, keep your political opinions to yourselves, especially on social networking sites!
No matter what side of the arguments (isle) you're coming from, I guarantee you WILL alienate or even anger HALF of your potential clients! I'm not saying hide, beat around the bush or flat out lie about your opinions or beliefs. My tip is, unless asked directly, keep your pie hole shut!