I wasn't suggesting that the threshold is 20 minutes. Instead, my comment
is that 20 minutes is clearly above the threshold, so this is evidence that
there must be *some* reasonable threshold that won't break many games.
 30sec? 20sec?  10sec?  3sec?  This could probably be resolved with a
rather fun short survey of games.

On Fri, Apr 20, 2012 at 1:44 AM, Justin Lebar <justin.le...@gmail.com>wrote:

> On Fri, Apr 20, 2012 at 9:33 AM, Adrienne Porter Felt <a...@berkeley.edu>
> wrote:
> > Surely there are limits as to what even a game wants to do with a
> vibrator
> > -- I doubt a game is going to want to constantly vibrate the phone for 20
> > solid minutes.  Since that is the case, there must be a threshold.
>
> Sure, but if we set the threshold at 20 minutes of continuous
> vibration, we haven't accomplished very much in terms of avoiding user
> annoyance.
>
> > On Fri, Apr 20, 2012 at 1:12 AM, Justin Lebar <justin.le...@gmail.com>
> > wrote:
> >>
> >> > Maybe the API implementation itself can limit the number of vibration
> >> > requests made by a page in a period of time ...
> >>
> >> I don't know how to do this in a way which wouldn't mess up e.g. a
> >> game which uses the vibrator all the time.  In general, heuristics
> >> like this are hard.  :-/
> >>
> >> >>On 19 April 2012 11:31, JOSE MANUEL CANTERA FONSECA <j...@tid.es>
> wrote:
> >> >>> Is there any special risk on allowing any kind of unauthenticated
> >> >>>content
> >> >>> to request vibration without any permission request?
> >> >>>
> >> >>> Thanks, best
> >> >>>
> >> >>> El 16/04/12 07:55, "Lucas Adamski" <ladam...@mozilla.com> escribió:
> >> >>>
> >> >>>>Last call for comments!  So far the only feedback I have received is
> >> >>>>that
> >> >>>>it would be good to have a UI mechanism for determine which app is
> >> >>>>triggering the vibration, which sounds like a reasonable idea to me.
> >> >>>>Thanks!
> >> >>>>  Lucas.
> >> >>>>
> >> >>>>On Apr 11, 2012, at 10:36 PM, Lucas Adamski wrote:
> >> >>>>
> >> >>>>> Name of API: Vibration
> >> >>>>> Reference: http://dev.w3.org/2009/dap/vibration/
> >> >>>>>
> >> >>>>> Brief purpose of API: Let content activate the vibration motor
> >> >>>>>
> >> >>>>> Inherent threats: Obnoxious if mis-used, consume extra battery
> >> >>>>> Threat severity: low
> >> >>>>>
> >> >>>>> == Regular web content (unauthenticated) ==
> >> >>>>> Use cases for unauthenticated code: Vibrate when hit in a game
> >> >>>>> Authorization model for uninstalled web content: Explicit
> >> >>>>> Authorization model for installed web content: Implicit
> >> >>>>> Potential mitigations: Limit how long vibrations can run
> >> >>>>>
> >> >>>>> == Trusted (authenticated by publisher) ==
> >> >>>>> Use cases for authenticated code:[Same]
> >> >>>>> Authorization model: Implicit
> >> >>>>> Potential mitigations:
> >> >>>>>
> >> >>>>> == Certified (vouched for by trusted 3rd party) ==
> >> >>>>> Use cases for certified code:
> >> >>>>> Authorization model: implicit
> >> >>>>> Potential mitigations:
> >> >>>>>
> >> >>>>> Notes:  This API may be implicitly granted.  User can deny from
> >> >>>>>Permission Manager to over-ride an abusive app.
> >> >>>>>
> >> >>>>
> >> >>>>_______________________________________________
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