[feature request] Whitelist tag IDs

[javl]

I'm really happy with this module. I use tags in different places at home/work to trigger changes in wifi/bluetooth/alarms and now I only have to turn my phone's screen, instead of completely unlocking it.

But I was wondering if it would be possible to add some sort of whitelist, where the phone only responds to known tag IDs instead of every tag (and of course it should read every tag when fully unlocked). I think that would be a great solution in terms of usability AND security.