It matters not if they're delivering a pack of fags or a Sherman tank - the law re highway obstruction rules and regs are what they are.
Why should everyone else be inconvenienced or endangered because someone else thinks its a disproportionate hassle? After all, shoplifters think its a disproportionate hassle to pay form stuff, speeders think its a disproportionate hassle to be delayed by 30 seconds by obeying a speed limit, so why should any other class of law or rule breaker be ignored because to do the right thing is a 'disproportionate hassle'?
What makes them so special?
If you don't feel able to obey the rules of the road, then don't use the road. The regulations aren't simply an inconvenience to be ignored when it seems expedient to do. They're there to ensure convince and safety for all road users, not just whomsoever may be too lazy to park properly and havebto carry something an extra hundred yards.