Barbie,
The worst thing that can happen to a controller, far from spilling their coffee, is being knifed to death by an irate parent of a child killed in accident attributed (right or wrongly) to an ATC error! So far, THAT has happened twice.
If you were 100% sure it was clear, and you landed, you have demonstrated good airmanship
So how, exactly, can you determine that it's 100% clear and there's nothing about to enter the runway?
Are you seriously suggesting that, if you couldn't recieve landing clearance because of a blocked frequency, you would just land anyway?
I'm afraid your attitude towards ATC leaves a lot to be desired....maybe you think we'd be better off just looking after ourselves?