As a former ski pattroller, many hills also do not allow them, you may also want to wear wrist guards. The 'ole double wrist snap.
Although, the pic you posted are not "mini skis". A 135 is not really that short with new more modern skis, just more of a freestyle ski for hitting the snow parks.
These are snow blades that are banned on many hills.
Personally, I am on 155's slalom race skis, compared to my 213's "back in the day". Skis have gotten much shorter over the past couple years.