Of course not! We're adults and should be able to manage our state!
I would say "yes".....be as un-pleasant as you like...cuss, scream, call people harsh names.....just do it in the privacy of your own mind and don't spred the infection around. A good total bust out is good for what ails you...
A strategy could be to address your own unpleasantness and not buy into another’s. Either way both unpleasantness and pleasantness are responses of the ego to presented situations.
I have worked in some form of customer service my whole life, and hospitality for nearly 15 years. There is little more frustrating then a someone in a bad mood taking it out on you for no other reason then they know they can get away with it because you have to "take it" or risk your job.
Bad moods happen. I get it. I have bad moods too. But that is not a license to be an asshole.
I don't believe it gives me that right. My stuff is no one else's but mine. I feel the compulsion sometimes to react unpleasantly towards others because i'm human. but giving in to it would be projecting which is something i need to resist, and usually can.
Legally, everyone has a right to be unpleasant. The constitution freedoms of speech, press, religion, etc. protect the right to be unpleasant.
Ethically, I think it wrong to be unpleasant for having a bad day. We should always be kind to others. Besides, we will get more sympathy and comfort if we avoid being unpleasant, and maybe explain that we are a little on edge because such and such happened to us.
Sometimes the grief overwhelms a persons perspective for a day and they just make the grief greater by their actions.It may not be easy but the people I have come to admire are those people who we say have a stiff upper lip regardless of what comes at them.