You are impacted by the things you see and read whether you like it or not. It can be hard to erase from your mind undesirable images or messages you receive and they can cause much angst, anger, doubt and grief.
Twitter has recently posted a set of instructions on how you can control what you see on twitter, the conversations you are a part of and the types of notifications you receive.
Take action and mute bad messages so they don't impact you negatively. There is a wealth of good information out there that will engage your mind both positively and critically without exposing you to harm from trolls who are out to manipulate you.