I tend to cast spells on people as I pass by and see them fighting. Running through a lower level area and see somebody struggling against a mob, I'll cure 'em a few times so they don't die and usually cast protect and shell on them as well. Just being friendly.
But I'm never quite clear on the etiquette or effects of doing anything to the mob. I don't want to pull the mob off of them or damage their kill. Is there anything I could do to it w/o affecting their XP or grabbing onto the mob at all? Blind/Slow/Gravity, anything?
A related question - every so often I'll see someone fighting something and get linked by another mob. Would it be good etiquette to sleep the link? I don't want to affect them getting the kill or steal XP or anything, just trying to be neighborly and give them some breathing room to deal with the mob they're currently fighting.
So is there anything a good samaritan should do? Or is it really best to just silently wish them well and move on w/o doing anything?