They're big boys, they can take it. In Dropanuke's defence he said 'take the belts outside the uk', not just 'fight'.
He took his WBO belt away from the UK, what... Twice (once against a guy he's stopped in one, hardly a risky bout to travel for)? Out of 21 WBO fights, that's something like 7.5% of his title fights? Even his biggest fans can't call that a well traveled champion.
The last 2 in the US weren't for any legit belt.