Well in my defense I may not be a "paid biologist/invasive species specialist" but I do live and work on a lake that has them. I was here before they showed up, was here when hatches of them were borderline crazy in certain areas, and I'm still here .....on the lake.....every day.....and haven't seen but few THIS year.
I studied up on them enough that when a "biologist" was quoted in a MDC article I read claiming that he believed that drum had a real appetite for them and could "save the lake" I laughed out loud. That dude should be furloughed just for being openly ignorant and getting paid for it.
Believe what suits you, and support slinging tons of copper sulfate wherever ya want, but as I said....I DON'T THINK zebras have/or will harm our waterways if ignored, and MAY actually benefit them considering their current state of purity.
Personally I'm considerably more concerned with critters that are disappearing than I am ones that are showing up. Specifically Dragon and damsel flies, and frogs.