I'm a new homeschool dad, so I can't really come at it the same way you all may have, but I've also gotten some questionable advice over the last several months.
"You can do everything for free and have just as good an education as public school."
Uh...considering how bad our local schools are, that isn't a ringing endorsement. Further, after looking at some of the free stuff out there, I'm not sure that's an accurate assessment.
"You need to buy a boxed curriculum, otherwise the state won't accept you're homeschooling."
Uh...you do know I can read the Department of Education's website, right? It says I have to teach, reading, math, science, social studies, and language arts and spend 4.5 hours per day doing it. It doesn't say I need to drop hundreds of dollars on a boxed curriculum that may not even fit my family's needs.
"You really need to use <insert favorite approach here>."
Yeah, how about no.
I mean, don't get me wrong, those approaches may look fantastic from the outside, but that doesn't mean they work for everyone. Charlotte Mason is the way to go? My daughter doesn't like reading (yeah, I'm working on changing this). Unschooling? Oh, how I wish, but she doesn't seem inclined toward learning that way. Learing through life? See above.
Just because it works for your kid doesn't mean it'll work for mine. Suggest I look into it? Sure, that's fair. Tell me I have to do it? Yeah...I'm too anti-authoritarian for that to ever work on me.
"Oh, you're homeschooling? Do this math."
See anti-authoritarian comment above.
Honestly, I've gotten a few doozies and I'm just starting out at this. I can't wait to see what all I'll come across in the years to come.