Sinvaders
"I quite enjoy digging and I'd prefer to invent a gas mask than enslave a permanent heal-homin,"
Most of the people use an alt for this (just look at the only concern people had when the F2P has been released...), if it can reduce the amount of alt in game... then why not (like, no body can heal your source if you are wearing a gas mask or something).
I dont think this will help reduce "dummy" alts. People will simply not use mask and continue using alts.
Btw, from last 3 calls for CP I found someone only once.... Sometimes I am thinking if it has any meaning to even ask and wait. Load alt is easier and faster and always available and instead of waiting i can dig.