Is it normal to have this thought?
There's this one guy from my workplace who perceived my politeness too literally and seems like he keeps entering my apartment without invitation and my dad let him in besides saying that I don't want him coming in but due to fact that I find it difficult to say "Can you just leave?" should I just instead mix a drink with some kind of substance that will cause him physical illness (not lethal) so he decides to stay home? He stinks up the whole house and never bathes, has creepy facial expression, takes off shoes as if it's his own personal home, behaves as if he's in control of our private life, not to mention that we to sanitize everything he sat on so you know what? I wouldn't even mind if it's going to be his last drink. There's absolutely nothing to benefit from this person as he's completely useless to me.