The question is a bit broad... but here are some thoughts.
First, the THD/TDD regulations and standards applied to a device depend on the country of jurisdiction and the type of the device.
The definitions of THD/TDD usually only include a certain number of harmonics... for example, the harmonics of order 2 ... 40. Very high frequencies are not included, so the ringing may not even be problem according to the regulations. Non-harmonic distortion is also often not included.
This also applies to the limit values of individual harmonic components. Again, non-harmonic distortion may not be regulated at all. As far as I know, some standardization groups have recently taken a look at non-harmonic and high-frequency distortion.
Is your simulator (LTSpice?) able to calculate the harmonic components and THD/TDD? I think LTSpice does have some frequency-domain capabilities.
Is it a good idea to inject such distortion into the power network? Maybe not, but how much of a problem it would be? Have you taken power network impedances into account in your simulations? These will have an effect on the high-frequency components.
I'm not sure if the waveform you posted has a DC component, but having a DC component in the mains current is bad.
Just my 2cents, but I hope that this is useful.