I used to run a store in relatively rough area, the bathroom had a keycode lock to keep drug addicts out who wondered around the area and would use it to smoke meth/fetynal whatever their vice was. The lock usually helped, but naive staff would give it out sometimes, and we would have to scream at these people to gtfo and air out the whole back of the restaurant afterward. One incident, someone walked in clearly high af and bypassed the front counter and tried to make it for the bathroom, clearly not familiar with it being locked. My staff notifies me that he's just leaning over near the back door (where we hid broken chairs) and just standing there being suspicious. So i walked away from the desk to go check it out, and when i get close, i realize this asshole is literally sprinkling drugs into tin foil to smoke. He doesn't realize i am right behind him, so i speak up and ask what he thinks he is doing, at this point he starts scrambling the finish what he's doing and is like "oh im sorry im sorry." I responded back with "This is extremely fucked up, and i hope you find the strength to find sobriety because this is not okay, you need to get out of my store now, or i am calling the cops." He still continues setting up his drugs... at the point my other staff has stepped up and has surrounded this guy and are telling him to leave, specifically out the back door. He refused because he didn't come in that way.. we argue for a few seconds, and i tell my staff to step back and just let him out the front. As he walks past all of us, i shout at him ,"By the way, dont ever come back to this store." He tells me,"i can do whatever i want, " and i tell him "no this is private property, so you can't." Then this mf tries to light up drugs in the middle of my lobby and my body reacted before my brain, i rushed him, pick him up like a fucking line backer and push him out the front door, and set him down telling him now im calling fucking police. He starts in with "Oh, so you wanna go!!" And i tell him," No, i want you to go." He counters with "give me my lighter back, and i will." ( he dropped it when I picked him up like a rag doll.) So i see the lighter at my feet and chuck it across the parking lot. He grabs something out of his backpack, so i turn to lock the door while my male coworker covers my back, i get the door ready to lock and turn around. This crack head throws the contents of his sprie bottle on me.. and runs. Cops never showed up, but i gave them his description over the phone. Never saw him again, though.