In Europe there is the EMC Directive which is downloadable from the Europa website, which applies to Machinery. This is backed up by Standards which are not downloadable, and cost a lot from the likes of BSI. The Standards list the levels of emissions and immunity, and it depends upon what the equipment is. We wouldn't have aviation Standards for example.
The company I work for does EMC testing and we find that most manufacturers don't bother doing it, relying on 'good electrical practice'. The majority of machines we test anyway fail first time. This does not necessarily mean they are dangerous, but could be subject to unexpected movements - not a problem generally on the ground, but could be at 40,000 feet.
Anything with variable frequency drives is likely to cause problems, many conveyor systems and some GSE have issues. We tested some equipment used to build bridges, as it was considered they could be a danger to low flying aircraft in the vicinity...
I was on a 747 in the middle of the Atlantic when a message came over the tannoy about turbulence. It caused all of the video equipment to freeze and had to be reset - the EMC engineer with me told me it was an EMC problem on the aircraft, not what I wanted to hear at that moment.
I do think it is a growing problem, because so many people ignore it, and it is not policed very well in the UK, less so in the rest of Europe, although I believe Russia are very hot on it.