Why on earth would you tie an aerolane down during brief intervals between flights, unless it is a very windy day?
If you have hover-taxying helos in mind, this sounds like blaming the victim, not the perpetrator. The answer is to teach airmanship to any pilot (not just helos) who don't have it. I've never flown a helo, but when I checked out in the Yak 52 it was emphasisied to me what that 360hp prop blast can do to aircraft parked behind - it can literally blow them away if high power is used in inappropriate circumstances.
SSD