This is my personal experience. I cooked for a good friend and her guests liked it. One of her guests liked it so well she asked me to cook for a different event. I did not know this person and did not know who would be bringing what, and if they understood serve safe procedures. I had a bad feeling and turned her down. That was a good decision on my part. Someone brought some bad potato salad or something, several people got sick and the department of heath did an investigation. CYA holds very true here.
This thread turned a little sour, some people misunderstood the original intent, but still worth a read.