> because people love to "rev" the weed whacker constantly instead of just holding down the button.

With at least the weedwhacker I have, there's not really an option. If you hold the button down, it overheats. If you leave it up to long, it shuts off. As a result, any time I'm walking across pavement, or in between patches that need weedwhacking, I have to rev the stupid thing.

I agree with everything you've said though. I don't have a choice right now, but the way suburban/urban landscaping is done is a nightmare.