Check out the requirements and it'll be pretty clear. Retirees won't be eligible as of course: there'll always be some other special criteria that would qualify them. I've never seen a report of someone who got one as a retiree who's not worked here, married etc.etc.
for retirees, getting citizenship is almost impossible so not realistic. Likewise, the crackdowns you refer to have (so far) been very limited and specific cases
it's true, but it's also true that save for a handful of high profile (and high value) xceptions in Phuket, the crackdown has yet to happen and if it does , it's likely that it would be announced in advance thus giving time to make arrangements for an alternative. It's worth noting that the problem would be the same for Thais owning property through a company not just foreigners
Seems improbable (for which, read irresponsible) that anyone would rent from a landlord without verifying that the person renting is actually the landlord (i.e. by producing a copy of their ID - same for the tenant) but maybe some people are too trusting
Bhante, which part of CM are you staying? Several places are running vaccination programmes, including Airport plaza (South), Mother and child (central) Nakornping hospital (Mae rim/North)
Education visa is Non immigrant ED and is usually (for language school) valid for 90 days renewable on extension each time for a further 90 days up to a year at which time you need a new visa or a different category of extension such as marriage or retirement