We are not a Starbucks

I have noticed lately that more and more people feel perfectly fine bringing in their own cups of coffee to my restaurant. Do they not get how incredibly rude that is? We sell coffee. I have to French press it every time it's ordered so it's not like it's some skanky ass sludge that we call coffee and then overcharge for it. We charge two bucks for good premium coffee that we make to order. But every day some whore comes in straight from the Starbucks across the street with her grande mocha frappe fuckacino and sits in my station. It's always a women. Men don't do that. Would you carry in a Pizzeria Uno pizza to a Pizza Hut and eat there? No. Or would you order a frosty at Wendy's and then go eat it at Dairy Queen? No. But with coffee, people think it's okay. Stop it. What I hate most about it is if a bitch brings in her own coffee, when am I supposed to spit in it? A couple of weeks ago, when I brought the food to the table one lady was not there anymore. Her friends said she would be right back but she had to run an errand. Bitch showed up two minutes later with three cups of coffee from Dunkin' Donuts. What? For real?? I should have sold those three cups of coffee, increasing the check by $6.00 and therefore increasing my tip by a dollar. THEY ARE STEALING MY TIPS. Maybe next time I should just ring their food in to go and tell them I assumed they wanted to go eat it somewhere else.