Wrong. Really, I blame bad high school English teachers for this stuff. And I know, because I trained to be one
Why didn't you train to become a
good HS English teacher instead?

/jk
, and half the other student teachers in my class couldn't even explain what a finite verb is
Come to think of it neither can I.

Thankfully I'm studying something entirely different though else I'd be screwed.
There is simply no good reason not to begin a sentence or paragraph with a conjunction
I've already provided a good reason. Paragraphs separate points (quite literally), while conjunctions link them. It makes zero sense to use the two simultaneously from either a logical or grammatical perspective (unless the aim is to confuse the reader *cough* lawyers *cough*).
Conjunctions link clauses.
The previous paragraph's last clause & sentence (hopefully) had a full stop at the end thus terminating it. If you intend to link clauses (aka parts of sentences) across sentences then we might as well abandon fullstops (and paragraphs) since they've then lost their meaning.
As long as the new sentence (clause) follows meaningfully from that preceding it, it is absolutely acceptable to begin with a conjunction.
Surely sentence structure depends on grammar rules, not that it "follows meaningfully"? Half the SMS talk out there "follows meaningfully" but that doesn't make it grammatically correct.
The whole "And" thing was a random example though. Something with room for improvement if you like. I don't really have an issue with Tarryn since the content is mostly good.
BAN HIM!!! Spelling/grammar error!
Guilty as charged. In my defense, I'm not a writer by profession though and my schooling was mostly in German.
OT: I wonder who would be the last man standing if we instaban on grammar errors.
I keep track of all the hater IP addresses. It's a small group that has an agenda against Tarryn.
How does that help? 99% of IPs are dynamically allocated in SA, so unless its something you can take to court a hater's IP is useless.