1 - Stamp

The beauty of this is that it can be put anywhere - you know, on things that aren’t trash (like dress shirts!)

2 - QR code

For iPhones, this takes 4 seconds to transfer everything. 

Try it - point your camera here.

3 - Glider

This is totally not serious, but, you can long range bomb them as the moment presents itself (literally) into open doors.

These are my  "Cards"