if you attract them, yes - so you want to avoid attracting them to you. You deal with this is two ways - first, like attracts like. Keep your “vibrations high” , meaning, maintain control of your thoughts, stay positive and out of fear and you will attract positive entities, which is part of maintaining good spiritual hygiene , and second, know how to deal with negative entities if any show up. Be aware that you can create negative entities though your own anger, fear and other negative emotions, so to avoid all that keep emotional intelligence and through that emotional control.
They’re free and you can do them in the bathroom. I hope you have privacy in the bathroom. 
You don’t need tools, only your attention and intention. read the articles I linked and pick methods that work for you.
Also check out Tutorial : Tool-Free Magick Using Your Hands