Some people prefer seeing their toons do whatever-- helps immersion, looks better, etc.
That said, this is the fourth time I've stared at this thread, and I still can't get past "...buh... wait. Huh?" I can understand the irritation quite well-- you get stuff set up just right for RP purposes and then somebody undoes it, ahhhh!!-- but I'm one of those awful, troublesome, terrible people who chucks buffs and heals and rezzes around like confetti whenever I see another player. If I ran across someone lying dead in town, I couldn't promise I'd whisper them before trying to fix it, anymore than I usually bother to ask people getting beaten if they'd like a heal, or people out in the wild if they'd like some buffs. I just do it! It normally ends with happy people having buffs they wouldn't otherwise have, and in many cases if I tried to stop and ask I wouldn't get a reply, good or bad, until the person was five mountains away. That there are situations where my reflexive attempt to do good would end in doing bad distresses me! I would not like to accidentally do bad and then be yelled at for it!
Making the stupid little evil trinkets for sale would be good, mostly because it'd give some players harmless consumable fluff to spend money on, which I was under the impression the devs would like. Actually, phrased that way it sounds perfect. Devs, get on that!