From my point of view,..as new..,to send a PM to any of you in order to get focus on my "thread", would I see as a bad thing to do.
I would love to receive help....but this had to come voluntary.
The same goes for the asked mod, to ping the "Guru"
I feel, just like pointed out, that such an option might be "used" to often, and the receiver of the request, will go more from an voluntary contributer, to one that will have a task.
This might lead to burnout or to avoid the site.
I see it each day on our site where we offer free Readings....more and more members start to ask for specific readers for their request, and this lead to no answer at all, or at least seldom...again because it goes from voluntary to task.
Much can be achieved by the way the thread's tittle are "created".
Does this show a "good subject" line that fetch the interest of the one with knowledge in the field, then I think most of the job is done...then it up to the thread owner and the participant to keep the thread so good that the "Guru" feel the urge to watch it