You mean something that will not encourage fuel theft or just mean
getting someone to buy the fuel for you.

Indeed. Plus:

a. if filling stations could discriminate they could simply be
required not sell; but

b. the rest of us probably wouldn't be too happy to queue while
insurance is checked (and then checked further when it turns out the
database is out of date); and to lose the ability to pay at the pump.
And it'll all add to costs of course.

And buying a foreign registered vehicle wd continue to be another way to
waltz round all such checks. (The number of Romanian registered cars
around here is quite remarkable. In the South East it is increasingly
worth a booze cruise every 6 months to get the paperwork to show the
car's not been here more than 6 months.)
--
Robin
PM may be sent to rbw0{at}hotmail{dot}com