That's it, dont let other people ri your business ideas. You know more than them so why bother yourself to be distracted with their suggestions when they do know your plans? Those who like to distract you are jealous of your plans. They want to see you maintaining your status. That is the picture of a jealous person wanting to distract the ideas of others especially if it is about business. To avoid it, never share to anyone your business plans. Believe, follow, and follow what you believe. Be quick and firm in your decisions.