Where do you put these?

Where do you stick these? They are a good idea but I don't feel comfortable with my name and number hanging out there in the parking lots and in general public spaces. Inside maybe??

yes inside! i've been told in/near the bow.

Bow hatch, also a good idea to put relatives # on there incase you are also missing.

Inside it will be.

Inside walls of yak, near bow hatch, another in the rear if you have a large easy access hatch.

Also take a rubbing and a picture of your serial number and keep on file at home.

I second the keeping a picture of the serial number.  Too much gear seems to disappear these days and having documentation of ownership is very useful for police reports and possible recoupment of gear.  I have a spreadsheet with all my gear serial numbers (and purchase dates) just in case.  I also import a picture of said S/N into the spreadsheet.  Never know when it might come in handy.......