I disagree, though I honestly wouldn't think that anyone below T5 should get this perk if the staff ever does decide to make it a perk. Still seems unlikely, but I think little perks like this ought not be attached to a donation tier and doesn't count towards pushing you into any tier, but sold individually for the price of 1-3 tiers. :p
Meaning...perks like more PM space; Beyond what the tiers themselves give you, Extra Custom Usertitles; As in formatting and images only.
Things like that are reserved for staff now could definitely generate more income for PC if sold individually and installed by an administrator.
I think that maybe even being able to buy stuff like inline HTML for signatures would be cool. Code up your signature the way you want in HTML, Submit code to the administrator and let them review it, and they install it for you. (No referencing external scripts or complicated inline scripts, just approved scripts only for visual FX)
T6 would be able to pick up these little perks easily because it's priced WAYY up there, but meh, I don't think those folks care. Still would be a nice gesture for someone who bothers to get to T6.
Though in all honesty I don't expect any of the staff members to bite on this idea, I'm just gonna put it out there and see what comes of it.