London is the third most visited city and Heathrow is the second most popular airport by international visitors. The prospect of being arrested upon arrival there might be a little annoying.
Even if you don't intend to ever set foot in the UK you could find yourself there unintentionally, if your airline needs to make an unplanned diversion. So you basically have to forego any European air travel.
I wouldn't go that far. It's easy to find flights with routes where a diversion to the UK would either never make sense or be impossible due to distance.
