The EU acting in a beligerent way is an admittance of weakness. If they were powerful then they we would let the UK leave with no problems.
It is not in the EU's interest to let the UK have all the benefits of being a member without actually being a member.
If I was a non-UK but EU business, I may even consider moving off .eu sooner rather than later (assuming they actually did this to the UK)... If I was a new business, I'd probably avoid .eu altogether.
What do you think?