I guess I don't put that much value on something that's mine but I don't use very often, that could help someone else out.
Would you do the same with your back garden (if you have one)? Your actual house whilst you're away on holiday? Would you be happy if somebody just let themselves in, completely unarranged, and took up residence in your house? "Oh, yeah - just give us a call half an hour before you're due to arrive back."
We get on very well with out NDN and we often do each other little favours which are probably comparable to parking in somebody's currently-unused spot. The big difference is that we ASK or the other one OFFERS. You don't just help yourself - and even then tell them when they might be able to have their property back again if they ask.
Any shred of neighbourly give and take that there might have been in place (and I'd be interested to know what favours he regularly does for OP) was destroyed once he deliberately moved the bin and ignored the no parking sign on it.
It's a shame you have to go to the expense of buying and installing a bollard, OP, as well as the hassle of keeping your visitors waiting in the road after they've already arrived whilst you lower (if you drop it half an hour before you expect them, so they can just drive in, pound to a penny he'll be straight in there first), but you don't have any other option, it seems. You can't reason with him, because he's already made it abundantly clear that he is not a reasonable person. How dare he assume to use somebody else's property to make his life easier and then give them instructions as to how they need to put themselves out to work around his selfish preferences to use THEIR property.
At least with burglars, they tend to scarper as soon as they're disturbed - they don't usually tell you that you just need to wait and give them an hour or so to finish loading your stuff into their van.