Australian here.
I'm going to say that its only a rude word when used in slang and still depends on the context, I wouldn't classify it as a swear word. Root can mean f*ck, depending how its used. But you don't tell somebody to get rooted, like you would say get f*cked (actually, I guess people do say get rooted when they want to avoid saying get f*cked, it kind of tones it down). However, it's more widely used to refer to the act of sex, it would be synonymous with "shag", "bang", "screw" and f*ck, in that regard. The word is still used commonly for its other purposes, like plant roots, square roots, etc without the giggles. I wouldn't say its a swear word here, I'd say that you'd maybe hear it used to refer to sex if you're talking to somebody who speaks with a fair amount of Aussie slang.
The best way I can think to use it in context, would be the situation of waking up after a night clubbing and my roommate asks me if I "pulled any roots", referring to having sex with anybody, rather than doing the gardening, and with that, queue the jokes.
I like the general principles that Root brings to the table, I look forward to seeing more updates soon with progress towards the launch, and the discussions that follow.