No. You may decline any invitation at any time for any reason, no questions asked. In fact, you should decline invitations when you don’t have first-hand knowledge of the subject matter and/or when you perceive that you may have a conflict of interest (for example, if you are bound by a confidentiality agreement that prevents you from discussing a particular topic with others). It is much better to decline an invitation than to misrepresent yourself and waste a customer’s time – or even worse, put yourself in a conflicted position!