Since the Q&A session is a normal part of your presentation, you should prepare yourself for the inevitability of hostility from someone in the room. If it doesn’t happen that way, great. If it does happen, you will be prepared to diffuse the hostility with a constructive and effective approach because you will be prepared for every situation by the time you are standing in front of your audience.
As you are building your brand and then maintaining your brand, you will get all sorts of people to notice you. Of course, you will get the right people to notice you. Those are people with whom you wish to interact. You will also get the wrong people to notice you online.
No one enjoys being criticized! Yet, if you want to succeed, you’ve got to overcome all of your natural instincts and actively seek out feedback, good and bad.