Here we go again ... I don't think we are all on the same page on this one. Time for the old soap box ...
We all have an identity which is very personal to each of us. When I am at home, I wear old ratty cargo shorts with paint stains on them, flip-flops and ancient concert t-shirts. I seldom shave and opt for a ball cap rather than deal with the doo. When I go on a poker run ... yup kids ... I'm a biker too ... who'd of thunk it ... I wear my leathers and a big honkin' gold earring. That's on MY time ... BUT ...
When I pull into the parking lot of a power plant or anyplace else where a company is PAYING ME FOR MY TIME ... it is no longer my time ... it has been purchased, fair and square, by someone else. And because of that, I have an obligation to present myself in manner in keeping with the standards and expectations of that company. I forfeit the "right" to fly my freak flag when I sell that time. And don't anybody go fooling themselves ... That's what it is ... We sell our time to a company, and that time is supposed to be spent working in the best interest of the company.
Analogy: You have a grown daughter who is getting married. You are having the reception at a very nice place and you have shelled out a big chunk of change for a group of professional caterers to support the event. They will be interfacing with the guests at the reception ... guests who know you ... people who are friends and business associates ... neighbors etc. ... Do you want your new son-in-law's family being served their dinner by a guy with enough facial accoutrement's to qualify him/her for the cover of National Geographic? Would you like the wait staff to sag their pants so far down that their boxers and half of their booty is visible to all? How's about none of them bathe before coming to work for you?
See ... YOU have paid for THEIR time in that instance. You have struck a deal with them which gives you control of what they do for the time they spend providing said service to you. You have the right to expect them to conform to a standard, set by you, for the time they are actively performing the duties for which you have contracted them. Once they are off your clock, they can strip naked and run the streets ... But while they are being paid for their time by you, they have forfeited that option.
No one in this business is being asked to change who they are. Your time outside work will always be yours. And you always have the option of waving your proverbial freak flag at work ... but remember ... the "company" also has the option of not inviting you back to do so again. You can only do that for so long before you run out of plants.
Okay ... Putting away the soap box. Let the smiting begin.