Requiring Attribution: good idea?

[quinxorin]

I was wondering what people thought about requiring attribution for use of copyleft-licensed creations by FIRST teams for FIRST teams, intended to be used publicly. Is this considered rude? Specifically, I'm refering to my team's Lightning Robotics Match Results Retrieval System. It allows free use and modification, but requires attribution both in any redistributed copies and on the actual website pages that use it. Is it ok to require teams to say on their website that they're using technology that was developed by a different team (obviously it's legally ok, but is it socially ok)? Would it discourage teams from using it?