I quit my job and went to another company. Shortly after starting at my new job, two of my former clients called and said they wanted to stick with me, not my previous employer. They are now my clients again, but through my new employer. My old employer is threatening to sue me for breaching a confidentiality agreement, disclosing confidential customer lists and pricing information, and engaging in related "illegal activities". I haven't ever disclosed confidential information, but I can't really stop these two clients from signing up with my new employer. Their letter demands that I stop working for these two clients and send a reply stating that I will abide by their demands. Is it safe to igore their letter? I do not want to spend time and money on an attorney, nor do I want to respond in a letter without consulting one. I'd rather just ignore them. Is that prudent? They are a large company with significant resources, but I've done nothing wrong and have never signed a non-compete with them. I'm in California.