In my opinion, you're mistaken if you don't think this kind of cringeworthy, juvenile b.s doesn't reflect poorly on the club. Employees of prestigious organisations that are in the media spotlight are usually aware that the way they conduct themselves publicly is under scrutiny and that it will reflect on their employers. As a representative of an organisation - and being paid a huge amount of money - there will be things expected of you during your work and in your free time.
Funny that one of the posters having a little self-congratulatory, condescending chuckle about folks reactions was also insisting/assuming that anyone who thought Rashford wasn't worth 300k a week would therefore logically have no understanding of business or management in any capacity. The irony...
The indignation about the way JLingz etc carry on is totally to be expected given the club's current trajectory. If I had savings in a firm that had just experienced significant losses due to incompetency and was then to witness the public facing figures of that same firm carrying on openly behaving like tits in the public eye, I would feel pretty annoyed. But if having a laugh about people's annoyance makes you feel superior, 'down wid da kidz' and gives you a little lift, then fair play to you if that's what gets you through the day.