I can see why you’d want to deflect this question as I agree it’s mildly annoying to always reply “cant yet†or “not lvl47†or whatever. I can also see Hessah’s point of trying to “hide†behind the lower title (although that may look funny with lvl48 pants and lvl50 shield

).
One thing to at least consider tho is that you are also “hiding†your skills between lvl20 and lvl47, namely: restore, revive, rejuvenate, invincible, immune, cure, trip, bleed.
Now some of those…meh…you just never hear “bleed plsâ€, but you may want people to know you can revive them if they fall, or cure if needs be, or simply have more “healing combos†with invincible, restore, etc…
Just like most other things, I think it boils down to personal pref

Personally I don’t mind the occasional “buff pls†coz most people understand when you tell them you cant. I think also if you reply in normal chat (or even shout, but don’t know if that would be ‘rude’) you at least have the chance that others see and wont ask you.