What would happen when two BoBs meet?

I was wondering if it would be possible to form two soccer teams consisting of BoBs and have them competing in a match. 

Creating a somewhat intelligent ball-thingy that knows when its' in which teams goal can't be too hard.

The first challenge that comes to my mind however is the sonars jamming or confusing each other. I mean, when Ronaldo-BoB casts his pings and gets a response, he may just as well be receiving (and thus acting on) Messi-BoB's pings as to his own. How will he ever know what to listen for and when to ignore?

Is there a way to filter out for certain frequencies or something?

Regards,

Erik

 

Uffda…

Yeah, we tried this once…  I dunno if it went anywhere.

Anyone else remember the soccer robots? What ever happened with those?